java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0ed9222-m [2019-01-11 14:23:30,419 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 14:23:30,421 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 14:23:30,432 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-11 14:23:30,433 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-11 14:23:30,434 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-11 14:23:30,435 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-11 14:23:30,437 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-11 14:23:30,439 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-11 14:23:30,440 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-11 14:23:30,441 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-11 14:23:30,441 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-11 14:23:30,442 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-11 14:23:30,443 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-11 14:23:30,444 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-11 14:23:30,445 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-11 14:23:30,446 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-11 14:23:30,448 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-11 14:23:30,450 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-11 14:23:30,452 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-11 14:23:30,453 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-11 14:23:30,454 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-11 14:23:30,456 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-11 14:23:30,457 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-11 14:23:30,457 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-11 14:23:30,458 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-11 14:23:30,459 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-11 14:23:30,460 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-11 14:23:30,460 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-11 14:23:30,462 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-11 14:23:30,462 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-11 14:23:30,462 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-11 14:23:30,463 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-11 14:23:30,463 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-11 14:23:30,464 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-11 14:23:30,465 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-11 14:23:30,465 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-11 14:23:30,477 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 14:23:30,478 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 14:23:30,478 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 14:23:30,478 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 14:23:30,479 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 14:23:30,479 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 14:23:30,479 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 14:23:30,479 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 14:23:30,479 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-11 14:23:30,480 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 14:23:30,480 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-11 14:23:30,480 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-11 14:23:30,480 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 14:23:30,480 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 14:23:30,481 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 14:23:30,481 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 14:23:30,481 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 14:23:30,482 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 14:23:30,482 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 14:23:30,482 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 14:23:30,482 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 14:23:30,482 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 14:23:30,482 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 14:23:30,483 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 14:23:30,483 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 14:23:30,483 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 14:23:30,483 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 14:23:30,483 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 14:23:30,484 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 14:23:30,484 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 14:23:30,484 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 14:23:30,484 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 14:23:30,484 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 14:23:30,485 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 14:23:30,485 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 14:23:30,485 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 14:23:30,485 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 14:23:30,485 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 14:23:30,486 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 14:23:30,486 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 14:23:30,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 14:23:30,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 14:23:30,547 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 14:23:30,548 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 14:23:30,549 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 14:23:30,549 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-11 14:23:30,550 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-11 14:23:30,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 14:23:30,590 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 14:23:30,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 14:23:30,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 14:23:30,591 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 14:23:30,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... [2019-01-11 14:23:30,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... [2019-01-11 14:23:30,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 14:23:30,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 14:23:30,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 14:23:30,648 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 14:23:30,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... [2019-01-11 14:23:30,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... [2019-01-11 14:23:30,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... [2019-01-11 14:23:30,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... [2019-01-11 14:23:30,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... [2019-01-11 14:23:30,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... [2019-01-11 14:23:30,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... [2019-01-11 14:23:30,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 14:23:30,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 14:23:30,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 14:23:30,674 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 14:23:30,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 14:23:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-11 14:23:30,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-11 14:23:31,270 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-11 14:23:31,271 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-11 14:23:31,272 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:23:31 BoogieIcfgContainer [2019-01-11 14:23:31,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 14:23:31,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 14:23:31,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 14:23:31,277 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 14:23:31,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:30" (1/2) ... [2019-01-11 14:23:31,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258348a2 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:23:31, skipping insertion in model container [2019-01-11 14:23:31,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:23:31" (2/2) ... [2019-01-11 14:23:31,280 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-11 14:23:31,296 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 14:23:31,304 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-11 14:23:31,321 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-11 14:23:31,353 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 14:23:31,354 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 14:23:31,354 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 14:23:31,354 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 14:23:31,354 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 14:23:31,354 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 14:23:31,355 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 14:23:31,355 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 14:23:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-11 14:23:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-11 14:23:31,377 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:31,378 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-11 14:23:31,384 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:31,392 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-11 14:23:31,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:31,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:31,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:31,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:31,449 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:31,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:23:31,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:23:31,630 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:23:31,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:23:31,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:23:31,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:23:31,647 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-11 14:23:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:31,844 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-11 14:23:31,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:23:31,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-11 14:23:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:31,859 INFO L225 Difference]: With dead ends: 37 [2019-01-11 14:23:31,859 INFO L226 Difference]: Without dead ends: 32 [2019-01-11 14:23:31,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:23:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-11 14:23:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-11 14:23:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-11 14:23:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-11 14:23:31,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-11 14:23:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:31,901 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-11 14:23:31,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:23:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-11 14:23:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:31,902 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:31,902 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:31,903 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-11 14:23:31,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:31,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:31,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:31,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:31,923 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:32,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:32,196 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:32,197 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:32,199 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-11 14:23:32,236 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:32,236 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:32,311 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:32,313 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:23:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:32,318 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:32,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:32,318 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:23:32,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:32,330 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:32,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:32,558 WARN L181 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-11 14:23:32,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:23:32,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:23:32,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:23:32,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,775 INFO L303 Elim1Store]: Index analysis took 101 ms [2019-01-11 14:23:32,776 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 34 treesize of output 60 [2019-01-11 14:23:32,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:23:32,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:32,996 INFO L303 Elim1Store]: Index analysis took 140 ms [2019-01-11 14:23:32,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:23:33,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:23:33,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:33,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 14:23:33,150 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,485 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,619 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,669 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:33,753 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:34,021 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:34,047 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:34,076 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:34,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:23:34,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:23:34,449 WARN L181 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2019-01-11 14:23:34,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:23:34,617 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-11 14:23:34,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:23:34,832 WARN L181 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-11 14:23:34,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,940 INFO L303 Elim1Store]: Index analysis took 104 ms [2019-01-11 14:23:34,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:23:35,097 WARN L181 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 14:23:35,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:23:35,318 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:23:35,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:23:35,353 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,455 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,679 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,743 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,816 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,915 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,974 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:36,084 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-11 14:23:36,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:23:36,212 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:36,402 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 14:23:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:36,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:36,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:23:36,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:23:36,526 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:23:36,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:23:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:23:36,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:36,527 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-11 14:23:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:47,970 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-11 14:23:47,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:23:47,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:23:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:47,972 INFO L225 Difference]: With dead ends: 63 [2019-01-11 14:23:47,973 INFO L226 Difference]: Without dead ends: 60 [2019-01-11 14:23:47,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:23:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-11 14:23:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-11 14:23:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-11 14:23:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-11 14:23:47,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-11 14:23:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:47,981 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-11 14:23:47,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:23:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-11 14:23:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:47,982 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:47,982 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:47,983 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-11 14:23:47,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:47,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:47,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:47,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:47,985 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:48,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:48,182 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:48,182 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:48,183 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-11 14:23:48,184 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:48,184 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:48,192 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:48,193 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:23:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:48,193 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:48,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:48,194 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:23:48,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:48,212 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:48,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:48,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:23:48,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:23:48,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,374 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 32 treesize of output 46 [2019-01-11 14:23:48,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:23:48,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:23:48,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:23:48,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:23:48,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:23:48,496 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:48,556 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:48,618 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:48,659 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:48,693 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:48,721 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:48,747 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:48,775 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:48,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,827 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 91 treesize of output 91 [2019-01-11 14:23:48,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:48,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:23:49,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,032 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 63 treesize of output 86 [2019-01-11 14:23:49,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:23:49,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:23:49,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:23:49,335 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:49,374 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:49,413 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:49,457 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:49,503 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:49,547 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:49,629 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:49,630 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-11 14:23:49,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:49,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 14:23:49,699 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:49,785 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:49,786 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-11 14:23:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:49,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:49,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:23:49,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:23:49,853 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:23:49,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:23:49,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:23:49,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:49,854 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-11 14:23:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:50,808 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-11 14:23:50,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:23:50,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:23:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:50,810 INFO L225 Difference]: With dead ends: 62 [2019-01-11 14:23:50,810 INFO L226 Difference]: Without dead ends: 60 [2019-01-11 14:23:50,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:23:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-11 14:23:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-11 14:23:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-11 14:23:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-11 14:23:50,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-11 14:23:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:50,819 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-11 14:23:50,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:23:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-11 14:23:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:50,819 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:50,819 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:50,820 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:50,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:50,820 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-11 14:23:50,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:50,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:50,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:50,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:50,821 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:50,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:23:50,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:23:50,908 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:23:50,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:23:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:23:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:23:50,909 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-11 14:23:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:51,052 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-11 14:23:51,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:23:51,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-11 14:23:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:51,053 INFO L225 Difference]: With dead ends: 31 [2019-01-11 14:23:51,054 INFO L226 Difference]: Without dead ends: 30 [2019-01-11 14:23:51,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:23:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-11 14:23:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-11 14:23:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-11 14:23:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-11 14:23:51,062 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-11 14:23:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:51,062 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-11 14:23:51,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:23:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-11 14:23:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:51,063 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:51,063 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:51,063 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:51,063 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-11 14:23:51,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:51,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:51,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:51,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:51,065 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:51,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:51,185 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:51,186 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:51,186 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-11 14:23:51,190 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:51,190 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:51,203 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:51,203 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:23:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:51,203 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:51,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:51,204 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:23:51,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:51,213 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:51,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:51,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:23:51,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:23:51,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:23:51,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:23:51,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:23:51,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:23:51,681 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:51,723 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:51,764 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:51,830 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:51,937 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,007 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:23:52,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:23:52,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:23:52,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:23:52,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:23:52,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:23:52,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:23:52,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:23:52,131 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,188 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,232 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,265 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,290 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,571 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,598 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,614 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,684 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:52,685 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-11 14:23:52,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:52,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 14:23:52,787 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,871 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:52,871 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-11 14:23:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:52,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:52,952 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 14:23:52,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-11 14:23:52,952 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:23:52,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 14:23:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 14:23:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-11 14:23:52,953 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-11 14:23:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:53,051 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-11 14:23:53,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 14:23:53,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-11 14:23:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:53,052 INFO L225 Difference]: With dead ends: 32 [2019-01-11 14:23:53,052 INFO L226 Difference]: Without dead ends: 31 [2019-01-11 14:23:53,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-11 14:23:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-11 14:23:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-11 14:23:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 14:23:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-11 14:23:53,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-11 14:23:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:53,061 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-11 14:23:53,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 14:23:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-11 14:23:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:53,062 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:53,062 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:53,062 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:53,062 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-11 14:23:53,063 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:53,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:53,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:53,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:53,064 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:53,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:53,141 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:53,141 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:53,142 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-11 14:23:53,144 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:53,144 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:53,152 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:53,152 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:23:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:53,153 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:53,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:53,153 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:23:53,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:53,165 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:53,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:53,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:23:53,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:23:53,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:23:53,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:23:53,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:23:53,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:23:53,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:23:53,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:23:53,345 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,407 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,452 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,487 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,517 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,540 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,563 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,582 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:23:53,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:23:53,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:23:53,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:23:53,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:23:54,065 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-11 14:23:54,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,181 INFO L303 Elim1Store]: Index analysis took 114 ms [2019-01-11 14:23:54,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:23:54,183 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:54,228 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:54,271 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:54,318 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:54,356 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:54,395 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:54,467 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:54,468 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-11 14:23:54,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:54,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 14:23:54,517 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:54,584 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:54,585 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-11 14:23:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:54,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:54,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:23:54,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:23:54,634 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:23:54,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:23:54,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:23:54,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:54,635 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-11 14:23:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:55,530 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-11 14:23:55,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:23:55,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:23:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:55,532 INFO L225 Difference]: With dead ends: 65 [2019-01-11 14:23:55,533 INFO L226 Difference]: Without dead ends: 64 [2019-01-11 14:23:55,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:23:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-11 14:23:55,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-11 14:23:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-11 14:23:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-11 14:23:55,545 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-11 14:23:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:55,545 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-11 14:23:55,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:23:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-11 14:23:55,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:55,546 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:55,546 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:55,546 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:55,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:55,547 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-11 14:23:55,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:55,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:55,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:55,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:55,548 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:55,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:55,636 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:55,636 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:55,636 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-11 14:23:55,639 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:55,639 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:55,648 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:55,649 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:23:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:55,649 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:55,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:55,650 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:23:55,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:55,661 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:55,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:55,704 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 27 treesize of output 30 [2019-01-11 14:23:55,709 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 30 treesize of output 36 [2019-01-11 14:23:55,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:23:55,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,731 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 34 treesize of output 60 [2019-01-11 14:23:55,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:23:55,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,853 INFO L303 Elim1Store]: Index analysis took 108 ms [2019-01-11 14:23:55,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:23:55,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:55,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:23:55,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:23:55,904 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,113 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,157 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,193 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,219 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,251 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,271 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,290 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:23:56,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:23:56,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:23:56,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:23:56,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:23:56,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:23:56,678 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,721 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,760 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,800 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,841 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,881 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:56,952 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:56,953 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-11 14:23:56,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:56,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 14:23:56,994 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:57,066 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:57,066 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-11 14:23:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:57,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:57,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:23:57,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:23:57,116 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:23:57,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:23:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:23:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:57,117 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-11 14:23:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:57,839 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-11 14:23:57,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:23:57,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:23:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:57,841 INFO L225 Difference]: With dead ends: 67 [2019-01-11 14:23:57,841 INFO L226 Difference]: Without dead ends: 65 [2019-01-11 14:23:57,842 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:23:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-11 14:23:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-11 14:23:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-11 14:23:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-11 14:23:57,851 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-11 14:23:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:57,851 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-11 14:23:57,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:23:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-11 14:23:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:23:57,852 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:57,852 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:23:57,853 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-11 14:23:57,853 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:57,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:57,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:57,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:57,854 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:57,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:57,962 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:57,962 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:23:57,962 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-11 14:23:57,963 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:57,963 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:57,969 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:57,969 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:23:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:57,970 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:57,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:57,970 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:23:57,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:57,979 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:57,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:58,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:23:58,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:23:58,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:23:58,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:23:58,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:23:58,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:23:58,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:23:58,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 14:23:58,148 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:58,339 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:58,440 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:58,475 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:58,506 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:58,529 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:58,547 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:58,566 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:58,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:23:58,745 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-01-11 14:23:58,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:23:58,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,811 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 83 treesize of output 103 [2019-01-11 14:23:58,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:58,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:23:59,009 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-11 14:23:59,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:23:59,144 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 14:23:59,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:23:59,316 WARN L181 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:23:59,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:23:59,333 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:59,390 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:59,446 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:59,501 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:59,561 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:59,673 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:59,734 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:59,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:59,829 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-11 14:23:59,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:59,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:23:59,875 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:59,969 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:59,970 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-11 14:24:00,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:00,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:00,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:00,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:00,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:00,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:00,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:00,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:00,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:00,107 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:24:00,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-11 14:24:00,111 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:00,221 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:00,222 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-11 14:24:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:00,272 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:00,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:00,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:00,335 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:00,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:00,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:00,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:00,336 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-11 14:24:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:04,664 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-11 14:24:04,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:04,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:04,667 INFO L225 Difference]: With dead ends: 82 [2019-01-11 14:24:04,667 INFO L226 Difference]: Without dead ends: 80 [2019-01-11 14:24:04,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:24:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-11 14:24:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-11 14:24:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-11 14:24:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-11 14:24:04,676 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-11 14:24:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:04,676 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-11 14:24:04,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-11 14:24:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:04,677 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:04,677 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:04,678 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-11 14:24:04,678 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:04,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:04,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:04,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:04,679 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:04,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:04,760 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:04,761 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:04,761 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-11 14:24:04,762 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:04,762 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:04,771 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:04,771 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:24:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:04,771 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:04,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:04,772 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:04,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:04,788 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:04,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:04,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-11 14:24:04,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-11 14:24:04,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-11 14:24:05,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-11 14:24:05,156 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-01-11 14:24:05,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-11 14:24:05,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-11 14:24:05,338 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,393 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,449 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,506 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,566 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,630 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:05,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-11 14:24:05,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-11 14:24:05,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-11 14:24:05,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-11 14:24:05,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-11 14:24:05,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-11 14:24:05,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-11 14:24:05,982 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,033 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,073 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,102 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,126 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,146 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,161 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,178 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,247 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:06,248 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-11 14:24:06,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-11 14:24:06,978 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 14:24:07,036 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-11 14:24:08,931 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-11 14:24:08,932 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:861 [2019-01-11 14:24:16,452 WARN L181 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 474 DAG size of output: 98 [2019-01-11 14:24:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:16,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:16,482 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 14:24:16,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-11 14:24:16,482 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:24:16,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 14:24:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 14:24:16,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-11 14:24:16,483 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-11 14:24:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:16,537 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-11 14:24:16,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:24:16,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-11 14:24:16,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:16,539 INFO L225 Difference]: With dead ends: 40 [2019-01-11 14:24:16,539 INFO L226 Difference]: Without dead ends: 39 [2019-01-11 14:24:16,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-11 14:24:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-11 14:24:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-11 14:24:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-11 14:24:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-11 14:24:16,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-11 14:24:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:16,549 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-11 14:24:16,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 14:24:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-11 14:24:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:16,550 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:16,550 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:16,550 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:16,551 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-11 14:24:16,551 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:16,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:16,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:16,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:16,552 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:16,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:16,930 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:16,930 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:16,930 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-11 14:24:16,931 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:16,931 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:16,936 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:16,937 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:16,937 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:16,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:16,937 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:16,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:16,956 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:16,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:17,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:24:17,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:24:17,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,154 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 83 treesize of output 103 [2019-01-11 14:24:17,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:24:17,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:24:17,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:24:17,613 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:24:17,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:17,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:24:17,638 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:17,708 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:17,773 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:17,847 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:17,918 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:17,993 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,064 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:18,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:24:18,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:24:18,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:24:18,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:24:18,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:24:18,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:24:18,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 14:24:18,255 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,332 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,374 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,408 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,433 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,452 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,470 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,487 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:18,583 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:18,583 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-11 14:24:18,829 WARN L181 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-01-11 14:24:18,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:18,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:24:18,874 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:19,002 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-11 14:24:19,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:19,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-11 14:24:19,047 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:19,175 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:19,176 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-11 14:24:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:19,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:19,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:19,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:19,326 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:19,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:19,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:19,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:19,327 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-11 14:24:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:23,397 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-11 14:24:23,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:23,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:23,399 INFO L225 Difference]: With dead ends: 84 [2019-01-11 14:24:23,400 INFO L226 Difference]: Without dead ends: 82 [2019-01-11 14:24:23,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:24:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-11 14:24:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-11 14:24:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-11 14:24:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-11 14:24:23,410 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-11 14:24:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:23,410 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-11 14:24:23,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-11 14:24:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:23,411 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:23,411 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:23,411 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-11 14:24:23,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:23,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:23,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:23,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:23,413 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:23,776 WARN L181 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-11 14:24:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:23,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:23,870 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:23,870 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:23,871 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-11 14:24:23,872 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:23,872 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:23,876 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:23,877 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:23,877 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:23,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:23,877 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:23,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:23,887 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:23,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:23,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:23,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:24:24,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:24:24,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:24:24,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:24:24,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:24:24,404 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 14:24:24,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:24:24,559 WARN L181 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:24:24,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:24,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:24:24,587 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:24,652 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:24,714 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:24,773 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:24,835 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:24,899 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:24,963 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:25,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:24:25,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:24:25,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:24:25,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:24:25,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:24:25,076 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:24:25,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 14:24:25,082 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,157 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,205 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,239 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,265 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,285 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,303 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,316 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,411 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:25,412 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-11 14:24:25,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:24:25,448 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,544 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:25,545 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-11 14:24:25,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:25,586 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:24:25,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-11 14:24:25,589 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:25,687 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:25,688 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-11 14:24:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:25,713 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:25,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:25,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:25,757 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:25,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:25,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:25,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:25,758 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-11 14:24:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:29,589 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-11 14:24:29,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:29,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:29,590 INFO L225 Difference]: With dead ends: 81 [2019-01-11 14:24:29,590 INFO L226 Difference]: Without dead ends: 80 [2019-01-11 14:24:29,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:24:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-11 14:24:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-11 14:24:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-11 14:24:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-11 14:24:29,599 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-11 14:24:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:29,600 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-11 14:24:29,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-11 14:24:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:29,601 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:29,601 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:29,602 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-11 14:24:29,602 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:29,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:29,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:29,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:29,603 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:29,748 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-01-11 14:24:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:29,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:29,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:29,950 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:29,950 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-11 14:24:29,951 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:29,951 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:29,956 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:29,956 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:29,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:29,956 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:29,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:29,957 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:29,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:29,972 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:29,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:30,103 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-11 14:24:30,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:24:30,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:24:30,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:24:30,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:24:30,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:24:30,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:24:30,684 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:24:30,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:30,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:24:30,709 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:30,772 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:30,837 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:30,905 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:30,989 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,069 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,144 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:31,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:24:31,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:24:31,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:24:31,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:24:31,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:24:31,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:24:31,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 14:24:31,262 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,330 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,371 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,402 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,426 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,446 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,464 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,480 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,572 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:31,572 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-11 14:24:31,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:24:31,609 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:31,729 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-11 14:24:31,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:31,780 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:24:31,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-11 14:24:31,782 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:31,876 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:31,876 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-11 14:24:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:32,045 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:32,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:32,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:32,088 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:32,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:32,089 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-11 14:24:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:35,852 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-11 14:24:35,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:35,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:35,854 INFO L225 Difference]: With dead ends: 81 [2019-01-11 14:24:35,854 INFO L226 Difference]: Without dead ends: 79 [2019-01-11 14:24:35,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:24:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-11 14:24:35,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-11 14:24:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-11 14:24:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-11 14:24:35,866 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-11 14:24:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:35,866 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-11 14:24:35,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:35,867 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-11 14:24:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:35,867 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:35,867 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:35,868 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:35,868 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-11 14:24:35,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:35,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:35,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:35,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:35,869 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:36,097 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-01-11 14:24:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:36,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:36,142 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:36,142 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:36,142 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-11 14:24:36,143 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:36,144 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:36,148 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:36,148 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:36,149 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:36,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:36,149 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:36,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:36,157 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:36,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:36,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:36,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:24:36,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:24:36,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:24:36,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:24:36,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:24:36,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:24:36,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 14:24:36,327 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:36,404 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:36,449 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:36,483 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:36,512 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:36,536 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:36,556 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:36,582 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:36,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,634 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 117 treesize of output 114 [2019-01-11 14:24:36,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:24:36,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:36,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:24:37,437 WARN L181 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-11 14:24:37,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:37,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:37,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:37,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:37,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:37,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:37,605 INFO L303 Elim1Store]: Index analysis took 165 ms [2019-01-11 14:24:37,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:24:38,165 WARN L181 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-11 14:24:38,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:24:38,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:24:38,410 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:24:38,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:24:38,428 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:38,481 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:38,536 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:38,592 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:38,651 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:38,707 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:38,765 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:38,858 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:38,858 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-11 14:24:38,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:38,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:24:38,935 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:39,026 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:39,027 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-11 14:24:39,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:39,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-11 14:24:39,131 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:39,226 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:39,226 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-11 14:24:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:39,307 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:39,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:39,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-11 14:24:39,356 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:39,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:39,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-11 14:24:39,357 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-11 14:24:43,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:43,906 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-11 14:24:43,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-11 14:24:43,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:43,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:43,908 INFO L225 Difference]: With dead ends: 99 [2019-01-11 14:24:43,908 INFO L226 Difference]: Without dead ends: 95 [2019-01-11 14:24:43,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-11 14:24:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-11 14:24:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-11 14:24:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-11 14:24:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-11 14:24:43,919 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-11 14:24:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:43,919 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-11 14:24:43,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-11 14:24:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:43,920 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:43,920 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:43,920 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-11 14:24:43,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:43,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:43,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:43,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:43,922 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:44,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:44,016 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:44,016 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:44,016 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-11 14:24:44,017 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:44,017 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:44,023 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:44,024 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:44,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:44,024 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:44,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:44,024 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:44,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:44,033 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:44,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:44,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:44,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:24:44,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:24:44,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:24:44,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:24:44,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,173 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:24:44,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:24:44,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:24:44,211 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,267 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,312 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,346 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,374 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,397 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,415 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,433 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:24:44,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:24:44,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:24:44,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:24:44,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:24:44,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:44,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:24:44,811 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,867 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,905 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,957 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:44,996 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:45,036 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:45,104 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:45,104 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:24:45,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 14:24:45,185 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:45,246 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:45,246 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-11 14:24:45,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:45,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-11 14:24:45,300 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:45,365 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:45,366 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-11 14:24:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:45,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:45,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:45,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:45,544 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:45,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:45,545 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-11 14:24:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:46,036 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-11 14:24:46,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:46,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:46,038 INFO L225 Difference]: With dead ends: 101 [2019-01-11 14:24:46,038 INFO L226 Difference]: Without dead ends: 99 [2019-01-11 14:24:46,039 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:24:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-11 14:24:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-11 14:24:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-11 14:24:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-11 14:24:46,052 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-11 14:24:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:46,052 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-11 14:24:46,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-11 14:24:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:46,053 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:46,053 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:46,054 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:46,054 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-11 14:24:46,054 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:46,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:46,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:46,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:46,055 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:46,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:46,156 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:46,156 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:46,156 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-11 14:24:46,157 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:46,158 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:46,161 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:46,162 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:46,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:46,162 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:46,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:46,162 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:46,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:46,170 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:46,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:46,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:46,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:24:46,680 WARN L181 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-01-11 14:24:46,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:46,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:46,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:24:47,148 WARN L181 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-01-11 14:24:47,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:24:47,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:24:47,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:24:47,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:47,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:24:47,419 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,459 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,499 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,537 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,578 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,620 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:47,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:24:47,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:24:47,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:24:47,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:24:47,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:24:47,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:24:47,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:24:47,772 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,873 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,913 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,944 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,969 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:47,988 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:48,005 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:48,021 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:48,087 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:48,088 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:24:48,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:48,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 14:24:48,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:48,200 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:48,201 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-11 14:24:48,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:48,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:48,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:48,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:48,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:48,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:48,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:48,238 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:24:48,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-11 14:24:48,240 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:48,306 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:48,306 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-11 14:24:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:48,334 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:48,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:48,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:48,409 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:48,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:48,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:48,410 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-11 14:24:48,912 WARN L181 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-01-11 14:24:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:50,598 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-11 14:24:50,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:50,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:50,600 INFO L225 Difference]: With dead ends: 99 [2019-01-11 14:24:50,600 INFO L226 Difference]: Without dead ends: 98 [2019-01-11 14:24:50,601 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:24:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-11 14:24:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-11 14:24:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-11 14:24:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-11 14:24:50,615 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-11 14:24:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:50,615 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-11 14:24:50,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-11 14:24:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:50,616 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:50,616 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:50,617 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-11 14:24:50,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:50,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:50,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:50,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:50,618 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:50,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:50,713 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:50,713 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:50,714 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-11 14:24:50,714 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:50,715 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:50,719 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:50,719 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:50,719 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:50,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:50,720 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:50,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:50,745 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:50,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:50,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:50,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:24:50,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,803 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:24:50,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:24:50,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:24:50,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:24:50,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:50,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:24:50,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:24:50,909 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:50,967 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,013 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,048 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,076 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,099 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,117 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,157 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:24:51,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:24:51,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:24:51,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:24:51,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:24:51,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:24:51,548 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,617 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,654 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,693 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,731 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,771 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:51,839 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:24:51,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 14:24:51,896 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:51,958 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:51,958 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-11 14:24:51,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:51,993 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:24:51,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-11 14:24:51,995 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:52,059 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:52,060 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-11 14:24:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:52,160 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:52,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:52,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:52,201 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:52,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:52,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:52,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:52,201 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-11 14:24:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:52,787 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-11 14:24:52,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:52,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:52,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:52,788 INFO L225 Difference]: With dead ends: 101 [2019-01-11 14:24:52,789 INFO L226 Difference]: Without dead ends: 99 [2019-01-11 14:24:52,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:24:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-11 14:24:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-11 14:24:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-11 14:24:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-11 14:24:52,805 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-11 14:24:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:52,805 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-11 14:24:52,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-11 14:24:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:52,806 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:52,806 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:52,806 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:52,807 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-11 14:24:52,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:52,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:52,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:52,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:52,808 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:52,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:52,957 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:52,957 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:52,957 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-11 14:24:52,959 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:52,959 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:52,964 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:52,964 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:52,965 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:52,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:52,965 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:52,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:52,978 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:52,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:53,195 WARN L181 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-11 14:24:53,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:53,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:24:53,702 WARN L181 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-01-11 14:24:53,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:53,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:53,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:24:54,277 WARN L181 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-01-11 14:24:54,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:54,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:54,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:54,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:54,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:24:55,028 WARN L181 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2019-01-11 14:24:55,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,147 INFO L303 Elim1Store]: Index analysis took 117 ms [2019-01-11 14:24:55,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:24:55,651 WARN L181 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-01-11 14:24:55,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:24:55,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:55,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:24:55,836 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:55,876 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:55,916 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:55,957 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:55,998 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,038 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:56,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:24:56,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:24:56,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:24:56,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:24:56,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:24:56,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:24:56,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:24:56,157 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,210 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,250 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,289 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,313 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,333 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,350 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,365 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,434 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:56,434 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:24:56,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 14:24:56,484 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,547 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:56,547 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-11 14:24:56,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:56,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-11 14:24:56,616 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:56,682 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:56,682 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-11 14:24:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:56,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:56,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:56,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:56,748 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:56,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:56,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:56,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:56,749 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-11 14:24:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:57,407 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-11 14:24:57,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:57,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:57,408 INFO L225 Difference]: With dead ends: 106 [2019-01-11 14:24:57,409 INFO L226 Difference]: Without dead ends: 104 [2019-01-11 14:24:57,410 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 [2019-01-11 14:24:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-11 14:24:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-11 14:24:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-11 14:24:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-11 14:24:57,423 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-11 14:24:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:57,423 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-11 14:24:57,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:57,424 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-11 14:24:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:57,424 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:57,424 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:57,425 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-11 14:24:57,425 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:57,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:57,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:57,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:57,426 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:57,660 WARN L181 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-11 14:24:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:57,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:57,671 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:57,671 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:57,671 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-11 14:24:57,673 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:57,673 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:57,676 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:57,677 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:57,677 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:57,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:57,677 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:57,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:57,692 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:57,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:57,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:24:57,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:24:57,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:24:57,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:24:57,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:24:57,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:24:57,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:57,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:24:57,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:24:57,792 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:57,850 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:57,896 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:57,932 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:57,960 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:57,984 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,003 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,019 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,064 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 91 treesize of output 91 [2019-01-11 14:24:58,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:24:58,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:24:58,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:24:58,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:24:58,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:24:58,421 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,457 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,495 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,534 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,574 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,614 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,709 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:58,709 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:24:58,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-11 14:24:58,758 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,825 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:58,826 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-11 14:24:58,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:58,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-11 14:24:58,881 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:58,947 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:58,947 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-11 14:24:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:58,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:24:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:59,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:24:59,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:24:59,019 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:24:59,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:24:59,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:24:59,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:24:59,020 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-11 14:24:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:59,718 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-11 14:24:59,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:24:59,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:24:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:59,721 INFO L225 Difference]: With dead ends: 107 [2019-01-11 14:24:59,721 INFO L226 Difference]: Without dead ends: 99 [2019-01-11 14:24:59,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:24:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-11 14:24:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-11 14:24:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-11 14:24:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-11 14:24:59,734 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-11 14:24:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:59,735 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-11 14:24:59,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:24:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-11 14:24:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:24:59,736 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:59,736 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:24:59,736 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:59,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-11 14:24:59,736 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:59,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:59,737 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:59,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:59,858 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:59,858 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:24:59,858 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-11 14:24:59,859 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:59,859 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:59,862 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:59,862 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:24:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:59,863 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:59,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:59,863 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:59,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:59,871 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:59,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:59,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:59,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:24:59,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:59,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:59,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:24:59,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:59,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:59,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:59,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:59,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:25:00,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:25:00,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:25:00,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:00,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:25:00,249 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,294 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,334 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,375 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,418 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,460 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:00,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:00,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:00,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:00,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:00,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:00,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:00,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:25:00,545 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,607 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,699 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,895 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,918 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,938 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,955 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:00,971 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:01,039 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:01,039 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-11 14:25:01,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-11 14:25:01,082 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 14:25:01,311 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-11 14:25:01,311 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-11 14:25:01,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:01,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-11 14:25:01,483 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-11 14:25:01,502 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-11 14:25:02,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:02,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:02,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:02,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:02,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:02,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:02,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:02,579 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:02,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-01-11 14:25:02,581 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:02,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-11 14:25:02,986 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-11 14:25:03,916 WARN L181 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-11 14:25:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:03,918 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:03,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:03,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-11 14:25:03,943 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:03,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:25:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:25:03,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:25:03,944 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-11 14:25:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:07,982 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-11 14:25:07,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-11 14:25:07,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:25:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:07,984 INFO L225 Difference]: With dead ends: 155 [2019-01-11 14:25:07,985 INFO L226 Difference]: Without dead ends: 152 [2019-01-11 14:25:07,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-11 14:25:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-11 14:25:08,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-11 14:25:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-11 14:25:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-11 14:25:08,004 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-11 14:25:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:08,005 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-11 14:25:08,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:25:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-11 14:25:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:25:08,006 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:08,006 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:25:08,006 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:08,006 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-11 14:25:08,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:08,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:08,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:08,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:08,008 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:08,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:08,052 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:08,052 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:25:08,052 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-11 14:25:08,053 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:08,053 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:08,055 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:08,055 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:25:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:08,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:08,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:08,059 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:08,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:08,071 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:08,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:08,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:08,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:08,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:08,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:08,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:08,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:08,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:08,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:25:08,187 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,244 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,288 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,323 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,351 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,374 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,393 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,411 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:25:08,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:25:08,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:25:08,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:25:08,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:25:08,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:08,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:25:08,797 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,833 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,870 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,909 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,948 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:08,987 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,056 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:09,056 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-11 14:25:09,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 14:25:09,091 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,159 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:09,159 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-11 14:25:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:09,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:09,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:09,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:25:09,206 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:09,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:25:09,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:25:09,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:25:09,207 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-11 14:25:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:09,527 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-11 14:25:09,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:25:09,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 14:25:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:09,529 INFO L225 Difference]: With dead ends: 104 [2019-01-11 14:25:09,529 INFO L226 Difference]: Without dead ends: 103 [2019-01-11 14:25:09,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:25:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-11 14:25:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-11 14:25:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-11 14:25:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-11 14:25:09,546 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-11 14:25:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:09,546 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-11 14:25:09,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:25:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-11 14:25:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:25:09,547 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:09,547 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:25:09,547 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:09,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:09,548 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-11 14:25:09,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:09,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:09,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:09,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:09,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:09,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:09,625 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:09,625 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:25:09,625 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-11 14:25:09,626 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:09,626 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:09,629 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:09,629 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:25:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:09,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:09,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:09,629 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:09,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:09,646 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:09,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:09,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:09,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-11 14:25:09,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-11 14:25:09,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-11 14:25:09,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-11 14:25:09,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-11 14:25:09,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:09,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-11 14:25:09,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-11 14:25:09,730 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,785 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,826 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,860 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,886 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,908 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,926 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,943 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:09,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-11 14:25:10,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-11 14:25:10,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-11 14:25:10,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-11 14:25:10,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-11 14:25:10,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-11 14:25:10,281 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:10,317 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:10,353 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:10,389 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:10,426 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:10,465 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:10,531 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:10,531 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-11 14:25:10,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:10,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-11 14:25:10,566 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:10,627 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:10,627 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-11 14:25:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:10,653 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:10,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:10,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:25:10,685 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:10,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:25:10,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:25:10,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:25:10,686 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-11 14:25:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:11,025 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-11 14:25:11,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:25:11,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 14:25:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:11,027 INFO L225 Difference]: With dead ends: 108 [2019-01-11 14:25:11,027 INFO L226 Difference]: Without dead ends: 107 [2019-01-11 14:25:11,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:25:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-11 14:25:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-11 14:25:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-11 14:25:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-11 14:25:11,044 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-11 14:25:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:11,044 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-11 14:25:11,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:25:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-11 14:25:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:25:11,045 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:11,045 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:25:11,045 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-11 14:25:11,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:11,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:11,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:11,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:11,046 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:11,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:11,185 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:11,185 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:25:11,185 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-11 14:25:11,185 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:11,186 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:11,188 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:11,189 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:25:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:11,189 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:11,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:11,189 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:11,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:11,200 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:11,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:11,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:25:11,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:25:11,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:25:11,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:25:11,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:25:11,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:11,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:25:11,660 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:11,700 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:11,740 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:11,781 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:11,822 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:11,863 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:11,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:11,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:11,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:11,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:11,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:11,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:11,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:11,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:25:11,949 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,001 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,042 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,073 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,097 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,117 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,142 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,158 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,226 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:12,227 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:25:12,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 14:25:12,277 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,340 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:12,340 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-11 14:25:12,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:12,596 INFO L303 Elim1Store]: Index analysis took 229 ms [2019-01-11 14:25:12,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 14:25:12,598 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:12,740 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:12,740 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-11 14:25:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:12,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:12,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:12,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-11 14:25:12,810 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:12,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:25:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:25:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-11 14:25:12,811 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-11 14:25:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:14,456 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-11 14:25:14,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-11 14:25:14,458 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:25:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:14,461 INFO L225 Difference]: With dead ends: 154 [2019-01-11 14:25:14,461 INFO L226 Difference]: Without dead ends: 153 [2019-01-11 14:25:14,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:25:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-11 14:25:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-11 14:25:14,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-11 14:25:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-11 14:25:14,483 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-11 14:25:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:14,483 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-11 14:25:14,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:25:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-11 14:25:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:25:14,484 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:14,484 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:25:14,485 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-11 14:25:14,485 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:14,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:14,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:14,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:14,486 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:14,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:14,618 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:14,618 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:25:14,619 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-11 14:25:14,622 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:14,622 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:14,624 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:14,625 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:25:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:14,625 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:14,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:14,626 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:14,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:14,638 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:14,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:14,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:14,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:14,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:14,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:14,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:14,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:14,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:14,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:14,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:25:14,740 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:14,797 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:14,841 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:14,876 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:14,902 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:14,924 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:14,942 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:14,960 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:15,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:25:15,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:25:15,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:25:15,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:25:15,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,241 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:25:15,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:25:15,402 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:15,440 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:15,478 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:15,516 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:15,555 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:15,595 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:15,663 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:15,664 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:25:15,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 14:25:15,711 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:15,779 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:15,780 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-11 14:25:15,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:15,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 14:25:15,814 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:15,880 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:15,880 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-11 14:25:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:15,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:15,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:15,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-11 14:25:15,954 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:15,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:25:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:25:15,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-11 14:25:15,954 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-11 14:25:16,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:16,626 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-11 14:25:16,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 14:25:16,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:25:16,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:16,628 INFO L225 Difference]: With dead ends: 148 [2019-01-11 14:25:16,628 INFO L226 Difference]: Without dead ends: 146 [2019-01-11 14:25:16,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:25:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-11 14:25:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-11 14:25:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-11 14:25:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-11 14:25:16,648 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-11 14:25:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:16,648 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-11 14:25:16,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:25:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-11 14:25:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:25:16,649 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:16,649 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:25:16,650 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:16,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:16,650 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-11 14:25:16,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:16,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:16,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:16,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:16,651 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:16,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:16,771 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:16,771 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:25:16,772 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-11 14:25:16,772 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:16,773 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:16,776 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:16,776 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:25:16,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:16,777 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:16,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:16,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:16,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:16,786 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:16,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:16,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:16,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:16,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:16,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:16,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:16,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:16,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:16,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:16,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:25:16,885 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:16,942 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:16,986 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,022 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,051 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,074 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,092 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,110 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:25:17,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:25:17,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:25:17,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:25:17,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:25:17,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:25:17,492 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,536 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,575 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,613 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,652 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,691 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,757 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:17,758 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:25:17,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 14:25:17,810 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:17,875 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-11 14:25:17,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:17,910 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:17,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-11 14:25:17,912 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:17,978 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:17,979 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-11 14:25:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:17,999 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:18,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:18,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:25:18,038 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:18,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:25:18,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:25:18,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:25:18,039 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-11 14:25:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:18,570 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-11 14:25:18,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:25:18,571 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:25:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:18,573 INFO L225 Difference]: With dead ends: 145 [2019-01-11 14:25:18,573 INFO L226 Difference]: Without dead ends: 143 [2019-01-11 14:25:18,573 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 [2019-01-11 14:25:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-11 14:25:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-11 14:25:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-11 14:25:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-11 14:25:18,592 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-11 14:25:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:18,593 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-11 14:25:18,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:25:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-11 14:25:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:25:18,594 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:18,594 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:25:18,594 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:18,594 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-11 14:25:18,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:18,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:18,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:18,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:18,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:18,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:18,679 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:18,679 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:25:18,679 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-11 14:25:18,680 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:18,680 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:18,683 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:18,684 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:25:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:18,684 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:18,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:18,684 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:18,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:18,693 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:18,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:18,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:18,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-11 14:25:18,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-11 14:25:18,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-11 14:25:18,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,742 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 36 treesize of output 74 [2019-01-11 14:25:18,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-11 14:25:18,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:18,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-11 14:25:18,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-11 14:25:18,782 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:18,835 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:18,876 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:18,908 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:18,935 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:18,956 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:18,974 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:18,992 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:19,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-11 14:25:19,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-11 14:25:19,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-11 14:25:19,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-11 14:25:19,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-11 14:25:19,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-11 14:25:19,336 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:19,372 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:19,407 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:19,444 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:19,480 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:19,519 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:19,584 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:19,585 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-11 14:25:19,782 WARN L181 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-01-11 14:25:19,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:19,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-11 14:25:19,789 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:19,850 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:19,850 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-11 14:25:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:19,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:19,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:19,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:25:19,924 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:19,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:25:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:25:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:25:19,924 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-11 14:25:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:20,615 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-11 14:25:20,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:25:20,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 14:25:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:20,618 INFO L225 Difference]: With dead ends: 124 [2019-01-11 14:25:20,618 INFO L226 Difference]: Without dead ends: 123 [2019-01-11 14:25:20,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:25:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-11 14:25:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-11 14:25:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-11 14:25:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-11 14:25:20,637 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-11 14:25:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:20,637 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-11 14:25:20,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:25:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-11 14:25:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:25:20,638 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:20,638 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:25:20,638 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-11 14:25:20,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:20,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:20,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:20,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:20,639 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:21,213 WARN L181 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-01-11 14:25:21,366 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2019-01-11 14:25:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:21,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:21,374 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:21,374 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:25:21,375 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-11 14:25:21,376 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:21,376 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:21,379 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:21,379 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:25:21,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:21,380 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:21,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:21,380 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:21,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:21,389 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:21,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:21,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:21,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:21,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:21,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:21,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:21,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:21,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:21,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:25:21,484 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:21,542 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:21,588 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:21,622 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:21,650 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:21,673 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:21,692 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:21,710 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:21,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:25:21,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:25:21,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:25:21,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:25:21,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:21,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:25:22,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:25:22,097 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:22,133 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:22,170 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:22,207 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:22,246 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:22,285 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:22,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:22,354 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:25:22,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-11 14:25:22,440 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:22,513 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:22,513 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-11 14:25:22,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:22,658 INFO L303 Elim1Store]: Index analysis took 116 ms [2019-01-11 14:25:22,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-11 14:25:22,660 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:23,019 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:23,019 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-11 14:25:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:23,045 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:23,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:23,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-11 14:25:23,089 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:23,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:25:23,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:25:23,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-11 14:25:23,090 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-11 14:25:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:23,966 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-11 14:25:23,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-11 14:25:23,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:25:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:23,969 INFO L225 Difference]: With dead ends: 176 [2019-01-11 14:25:23,969 INFO L226 Difference]: Without dead ends: 174 [2019-01-11 14:25:23,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-11 14:25:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-11 14:25:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-11 14:25:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-11 14:25:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-11 14:25:23,996 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-11 14:25:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:23,996 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-11 14:25:23,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:25:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-11 14:25:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:25:23,997 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:23,997 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:25:23,997 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-11 14:25:23,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:23,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:23,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:23,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:23,999 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:24,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:24,103 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:24,103 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:25:24,103 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-11 14:25:24,104 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:24,104 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:24,106 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:24,106 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:25:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:24,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:24,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:24,107 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:24,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:24,115 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:24,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:24,126 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 86 treesize of output 76 [2019-01-11 14:25:24,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-11 14:25:24,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-11 14:25:24,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-11 14:25:24,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-11 14:25:24,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:24,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-11 14:25:24,426 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,462 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,500 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,537 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,576 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,618 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:24,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-11 14:25:24,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-11 14:25:24,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-11 14:25:24,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-11 14:25:24,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-11 14:25:24,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-11 14:25:24,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-11 14:25:24,712 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,762 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,800 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,830 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,853 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,871 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,887 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,902 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:24,968 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:24,968 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-11 14:25:25,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-11 14:25:25,004 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:25,063 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:25,064 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-11 14:25:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:25,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:25,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:25,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:25:25,146 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:25,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:25:25,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:25:25,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:25:25,146 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-11 14:25:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:25,468 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-11 14:25:25,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:25:25,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-11 14:25:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:25,470 INFO L225 Difference]: With dead ends: 135 [2019-01-11 14:25:25,470 INFO L226 Difference]: Without dead ends: 134 [2019-01-11 14:25:25,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:25:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-11 14:25:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-11 14:25:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-11 14:25:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-11 14:25:25,491 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-11 14:25:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:25,491 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-11 14:25:25,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:25:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-11 14:25:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 14:25:25,492 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:25,492 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 14:25:25,492 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:25,492 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-11 14:25:25,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:25,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:25,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:25,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:25,493 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:25,689 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-01-11 14:25:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:25,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:25,783 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:25,783 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 14:25:25,783 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-11 14:25:25,784 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:25,784 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:25,787 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:25,787 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 14:25:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:25,787 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:25,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:25,788 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:25,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:25,795 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:25,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:25,918 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-11 14:25:25,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:25,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:25,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:25,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:25,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:25,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:25,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:25,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:25,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 14:25:25,982 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,058 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,102 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,135 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,163 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,187 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,208 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,225 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:25:26,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:25:26,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:25:26,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:25:26,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:25:26,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:25:26,777 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:25:26,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:26,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:25:26,793 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,848 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,903 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:26,959 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:27,017 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:27,075 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:27,134 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:27,226 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:27,227 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-11 14:25:27,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:25:27,266 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:27,357 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:27,357 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-11 14:25:27,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,410 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:27,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-11 14:25:27,411 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:27,503 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:27,503 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-11 14:25:27,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:27,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-11 14:25:27,563 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:27,654 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:27,654 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-11 14:25:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:27,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:27,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:27,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-11 14:25:27,739 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:27,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-11 14:25:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-11 14:25:27,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:25:27,740 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-11 14:25:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:28,966 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-11 14:25:28,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-11 14:25:28,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-11 14:25:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:28,970 INFO L225 Difference]: With dead ends: 212 [2019-01-11 14:25:28,970 INFO L226 Difference]: Without dead ends: 205 [2019-01-11 14:25:28,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-11 14:25:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-11 14:25:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-11 14:25:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-11 14:25:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-11 14:25:29,004 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-11 14:25:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:29,004 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-11 14:25:29,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-11 14:25:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-11 14:25:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 14:25:29,005 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:29,005 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 14:25:29,005 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:29,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:29,006 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-11 14:25:29,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:29,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:29,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:29,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:29,007 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:29,246 WARN L181 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-01-11 14:25:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:29,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:29,278 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:29,278 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 14:25:29,278 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-11 14:25:29,280 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:29,280 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:29,282 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:29,282 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 14:25:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:29,283 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:29,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:29,283 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:29,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:29,294 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:29,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:29,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:25:29,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:25:29,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:25:29,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:25:29,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:25:29,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:25:29,893 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:25:29,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:29,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:25:29,919 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:29,979 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,048 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,120 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,189 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,266 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,339 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:30,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:30,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:30,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:30,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:30,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:30,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:30,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 14:25:30,445 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,513 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,554 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,586 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,611 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,631 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,648 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,664 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,761 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:30,761 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-11 14:25:30,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:25:30,798 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:30,890 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:30,890 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-11 14:25:30,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:30,934 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:30,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-11 14:25:30,935 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:31,026 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:31,026 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-11 14:25:31,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:31,080 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:31,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-11 14:25:31,082 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:31,174 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:31,175 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-11 14:25:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:31,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:31,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:31,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-11 14:25:31,267 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:31,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-11 14:25:31,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-11 14:25:31,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-11 14:25:31,268 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-11 14:25:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:32,836 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-11 14:25:32,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 14:25:32,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-11 14:25:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:32,839 INFO L225 Difference]: With dead ends: 169 [2019-01-11 14:25:32,839 INFO L226 Difference]: Without dead ends: 168 [2019-01-11 14:25:32,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-11 14:25:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-11 14:25:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-11 14:25:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-11 14:25:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-11 14:25:32,869 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-11 14:25:32,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:32,869 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-11 14:25:32,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-11 14:25:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-11 14:25:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 14:25:32,870 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:32,870 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 14:25:32,870 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-11 14:25:32,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:32,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:32,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:32,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:32,871 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:33,376 WARN L181 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2019-01-11 14:25:33,542 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-11 14:25:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:33,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:33,558 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:33,559 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 14:25:33,559 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-11 14:25:33,560 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:33,561 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:33,563 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:33,563 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 14:25:33,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:33,563 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:33,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:33,564 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:33,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:33,579 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:33,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:33,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:25:33,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:25:33,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:25:33,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:25:33,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:25:33,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:33,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:25:34,114 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:25:34,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:25:34,132 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,192 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,250 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,308 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,368 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,429 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,490 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:34,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:34,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:34,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:34,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:34,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:34,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:34,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-11 14:25:34,589 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,659 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,700 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,732 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,755 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,775 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,792 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,808 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:34,900 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:34,900 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-11 14:25:34,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:34,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:25:34,940 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:35,037 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:35,038 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-11 14:25:35,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,078 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:35,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-11 14:25:35,080 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:35,170 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:35,170 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-11 14:25:35,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:35,215 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:35,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-11 14:25:35,217 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:35,309 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:35,309 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-11 14:25:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:35,373 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:35,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:35,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-11 14:25:35,432 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:35,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-11 14:25:35,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-11 14:25:35,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-11 14:25:35,433 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-11 14:25:38,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:38,841 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-11 14:25:38,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-11 14:25:38,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-11 14:25:38,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:38,844 INFO L225 Difference]: With dead ends: 176 [2019-01-11 14:25:38,844 INFO L226 Difference]: Without dead ends: 172 [2019-01-11 14:25:38,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-11 14:25:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-11 14:25:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-11 14:25:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-11 14:25:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-11 14:25:38,871 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-11 14:25:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:38,871 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-11 14:25:38,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-11 14:25:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-11 14:25:38,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 14:25:38,872 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:38,872 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 14:25:38,872 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:38,872 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-11 14:25:38,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:38,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:38,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:38,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:38,873 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:39,058 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-01-11 14:25:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:39,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:39,102 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:39,102 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 14:25:39,102 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-11 14:25:39,103 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:39,104 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:39,105 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:39,105 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 14:25:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:39,106 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:39,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:39,106 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:39,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:39,114 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:39,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:39,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:25:39,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:25:39,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:25:39,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:25:39,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:25:39,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:39,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:25:39,482 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,522 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,561 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,602 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,643 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,684 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:39,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:39,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:39,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:39,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:39,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:39,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:39,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:25:39,786 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,843 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,883 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,914 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,936 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,956 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,973 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:39,989 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:40,057 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:40,057 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:25:40,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:40,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-11 14:25:40,152 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 14:25:40,185 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-11 14:25:41,535 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-11 14:25:41,536 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:974 [2019-01-11 14:25:42,196 WARN L181 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 191 [2019-01-11 14:25:42,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 178 [2019-01-11 14:25:42,209 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:42,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 166 [2019-01-11 14:25:42,485 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:42,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,683 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:42,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 150 [2019-01-11 14:25:42,685 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:42,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-11 14:25:42,851 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:389, output treesize:277 [2019-01-11 14:25:42,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,986 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:42,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:42,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 155 [2019-01-11 14:25:42,989 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:43,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-01-11 14:25:43,213 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:43,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:43,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 170 [2019-01-11 14:25:43,411 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:43,582 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-11 14:25:43,582 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:239 [2019-01-11 14:25:43,865 WARN L181 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-11 14:25:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:43,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:43,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:43,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-11 14:25:43,911 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:43,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-11 14:25:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-11 14:25:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-11 14:25:43,912 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-11 14:25:44,569 WARN L181 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 73 [2019-01-11 14:25:52,128 WARN L181 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-01-11 14:25:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:53,942 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2019-01-11 14:25:53,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-11 14:25:53,942 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-11 14:25:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:53,945 INFO L225 Difference]: With dead ends: 235 [2019-01-11 14:25:53,945 INFO L226 Difference]: Without dead ends: 230 [2019-01-11 14:25:53,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-11 14:25:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-11 14:25:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2019-01-11 14:25:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-11 14:25:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2019-01-11 14:25:53,983 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2019-01-11 14:25:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:53,983 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2019-01-11 14:25:53,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-11 14:25:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2019-01-11 14:25:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 14:25:53,984 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:53,984 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 14:25:53,985 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2019-01-11 14:25:53,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:53,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:53,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:53,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:53,986 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:54,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:54,108 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:54,108 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 14:25:54,108 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2019-01-11 14:25:54,109 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:54,109 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:54,111 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:54,112 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:25:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:54,112 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:54,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:54,112 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:54,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:54,121 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:54,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:54,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:25:54,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:25:54,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:25:54,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:25:54,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:25:54,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:54,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:25:54,493 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,534 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,574 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,615 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,656 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,697 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:25:54,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:25:54,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:25:54,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:25:54,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:25:54,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:25:54,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:25:54,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:25:54,788 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,839 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,879 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,910 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,935 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,954 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,971 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:54,987 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:55,055 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:55,055 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:25:55,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:55,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-11 14:25:55,167 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 14:25:55,193 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-11 14:25:56,537 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-11 14:25:56,538 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:972 [2019-01-11 14:25:57,389 WARN L181 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 191 [2019-01-11 14:25:57,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 178 [2019-01-11 14:25:57,424 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:57,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,690 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:25:57,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 158 [2019-01-11 14:25:57,692 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:57,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:57,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 162 [2019-01-11 14:25:57,905 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:58,103 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-11 14:25:58,103 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:389, output treesize:277 [2019-01-11 14:26:02,387 WARN L181 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 158 [2019-01-11 14:26:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:02,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:26:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:02,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:26:02,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-11 14:26:02,429 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:26:02,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:26:02,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:26:02,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-11 14:26:02,430 INFO L87 Difference]: Start difference. First operand 145 states and 973 transitions. Second operand 8 states. [2019-01-11 14:26:22,090 WARN L181 SmtUtils]: Spent 8.71 s on a formula simplification. DAG size of input: 168 DAG size of output: 161 [2019-01-11 14:26:30,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:26:30,902 INFO L93 Difference]: Finished difference Result 254 states and 1519 transitions. [2019-01-11 14:26:30,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 14:26:30,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-11 14:26:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:26:30,907 INFO L225 Difference]: With dead ends: 254 [2019-01-11 14:26:30,907 INFO L226 Difference]: Without dead ends: 253 [2019-01-11 14:26:30,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:26:30,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-01-11 14:26:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 197. [2019-01-11 14:26:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-01-11 14:26:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 1447 transitions. [2019-01-11 14:26:30,971 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 1447 transitions. Word has length 5 [2019-01-11 14:26:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:26:30,971 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 1447 transitions. [2019-01-11 14:26:30,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:26:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 1447 transitions. [2019-01-11 14:26:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 14:26:30,972 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:26:30,972 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 14:26:30,973 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:26:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:30,973 INFO L82 PathProgramCache]: Analyzing trace with hash 29588574, now seen corresponding path program 1 times [2019-01-11 14:26:30,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:26:30,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:30,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:30,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:30,974 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:26:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:31,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:31,106 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:26:31,106 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 14:26:31,106 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [32], [35] [2019-01-11 14:26:31,106 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:26:31,107 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:26:31,108 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:26:31,108 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 14:26:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:31,109 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:26:31,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:31,109 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:26:31,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:31,117 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:26:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:31,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:26:31,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:26:31,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:26:31,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,192 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:26:31,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:26:31,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:26:31,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:26:31,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:26:31,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:26:31,240 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,295 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,340 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,376 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,405 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,428 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,448 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,466 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:26:31,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:26:31,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:26:31,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,675 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:26:31,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:26:31,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:31,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:26:31,855 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,893 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,930 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:31,969 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:32,008 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:32,047 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:32,116 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:26:32,116 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:26:32,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:32,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-11 14:26:32,212 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 14:26:32,238 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-11 14:26:33,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-11 14:26:33,597 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:972 [2019-01-11 14:26:34,345 WARN L181 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 191 [2019-01-11 14:26:34,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,355 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:26:34,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 174 [2019-01-11 14:26:34,357 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:34,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-11 14:26:34,638 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:34,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:34,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 174 [2019-01-11 14:26:34,889 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:35,099 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-11 14:26:35,100 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:389, output treesize:277 [2019-01-11 14:26:35,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,323 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:26:35,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 171 [2019-01-11 14:26:35,325 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:35,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-01-11 14:26:35,567 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:35,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:35,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 166 [2019-01-11 14:26:35,780 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:35,956 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-11 14:26:35,956 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-11 14:26:36,239 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-11 14:26:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:36,241 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:26:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:36,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:26:36,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-11 14:26:36,293 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:26:36,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-11 14:26:36,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-11 14:26:36,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:26:36,294 INFO L87 Difference]: Start difference. First operand 197 states and 1447 transitions. Second operand 10 states. [2019-01-11 14:26:37,036 WARN L181 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 73 [2019-01-11 14:26:56,552 WARN L181 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 147 [2019-01-11 14:27:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:27:06,031 INFO L93 Difference]: Finished difference Result 300 states and 1910 transitions. [2019-01-11 14:27:06,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-11 14:27:06,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-11 14:27:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:27:06,036 INFO L225 Difference]: With dead ends: 300 [2019-01-11 14:27:06,036 INFO L226 Difference]: Without dead ends: 299 [2019-01-11 14:27:06,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2019-01-11 14:27:06,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-01-11 14:27:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 195. [2019-01-11 14:27:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-01-11 14:27:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 1429 transitions. [2019-01-11 14:27:06,109 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 1429 transitions. Word has length 5 [2019-01-11 14:27:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:27:06,109 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 1429 transitions. [2019-01-11 14:27:06,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-11 14:27:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 1429 transitions. [2019-01-11 14:27:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 14:27:06,110 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:27:06,110 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 14:27:06,110 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:27:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:27:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash 29589070, now seen corresponding path program 1 times [2019-01-11 14:27:06,111 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:27:06,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:27:06,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:27:06,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:27:06,112 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:27:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:27:06,449 WARN L181 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2019-01-11 14:27:06,673 WARN L181 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2019-01-11 14:27:06,911 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2019-01-11 14:27:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:27:06,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:27:06,941 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:27:06,941 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 14:27:06,942 INFO L207 CegarAbsIntRunner]: [0], [6], [26], [32], [35] [2019-01-11 14:27:06,943 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:27:06,943 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:27:06,945 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:27:06,945 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 14:27:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:27:06,945 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:27:06,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:27:06,946 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:27:06,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:27:06,960 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:27:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:27:06,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:27:07,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-11 14:27:07,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-11 14:27:07,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-11 14:27:07,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-11 14:27:07,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-11 14:27:07,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:07,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-11 14:27:07,381 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,441 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,501 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,560 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,618 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,681 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:27:07,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-11 14:27:07,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-11 14:27:07,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-11 14:27:07,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-11 14:27:07,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-11 14:27:07,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-11 14:27:07,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-11 14:27:07,798 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,848 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,889 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,920 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,945 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,965 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,982 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:07,998 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:08,067 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:27:08,068 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-11 14:27:08,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:08,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-11 14:27:08,169 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 14:27:08,211 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-11 14:27:09,569 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-11 14:27:09,569 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:974 [2019-01-11 14:27:10,471 WARN L181 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 191 [2019-01-11 14:27:10,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 186 [2019-01-11 14:27:10,482 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:10,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-11 14:27:10,769 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:10,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:10,998 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:27:10,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 158 [2019-01-11 14:27:11,000 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,176 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-11 14:27:11,177 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:389, output treesize:277 [2019-01-11 14:27:11,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 132 [2019-01-11 14:27:11,307 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-01-11 14:27:11,516 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:11,731 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:27:11,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 177 [2019-01-11 14:27:11,733 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:11,917 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-11 14:27:11,917 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:239 [2019-01-11 14:27:12,113 WARN L181 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-11 14:27:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:27:12,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:27:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:27:12,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:27:12,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-11 14:27:12,174 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:27:12,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-11 14:27:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-11 14:27:12,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:27:12,175 INFO L87 Difference]: Start difference. First operand 195 states and 1429 transitions. Second operand 10 states. [2019-01-11 14:27:19,373 WARN L181 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 254 DAG size of output: 69 [2019-01-11 14:27:34,772 WARN L181 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 147 [2019-01-11 14:27:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:27:39,086 INFO L93 Difference]: Finished difference Result 319 states and 2106 transitions. [2019-01-11 14:27:39,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-11 14:27:39,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-11 14:27:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:27:39,091 INFO L225 Difference]: With dead ends: 319 [2019-01-11 14:27:39,091 INFO L226 Difference]: Without dead ends: 317 [2019-01-11 14:27:39,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=78, Invalid=131, Unknown=1, NotChecked=0, Total=210 [2019-01-11 14:27:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-01-11 14:27:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 236. [2019-01-11 14:27:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-01-11 14:27:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 1823 transitions. [2019-01-11 14:27:39,156 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 1823 transitions. Word has length 5 [2019-01-11 14:27:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:27:39,156 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 1823 transitions. [2019-01-11 14:27:39,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-11 14:27:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 1823 transitions. [2019-01-11 14:27:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 14:27:39,157 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:27:39,157 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 14:27:39,158 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:27:39,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:27:39,158 INFO L82 PathProgramCache]: Analyzing trace with hash 29604758, now seen corresponding path program 1 times [2019-01-11 14:27:39,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:27:39,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:27:39,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:27:39,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:27:39,159 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:27:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:27:39,304 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-01-11 14:27:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:27:39,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:27:39,332 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:27:39,332 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 14:27:39,332 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [36], [37] [2019-01-11 14:27:39,333 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:27:39,333 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:27:39,336 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:27:39,336 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:27:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:27:39,336 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:27:39,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:27:39,336 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:27:39,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:27:39,351 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:27:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:27:39,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:27:39,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-11 14:27:39,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-11 14:27:39,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-11 14:27:39,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-11 14:27:39,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-11 14:27:39,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-11 14:27:39,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-11 14:27:39,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-11 14:27:39,471 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:39,526 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:39,575 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:39,608 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:39,634 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:39,653 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:39,670 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:39,687 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:39,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-11 14:27:39,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-11 14:27:39,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-11 14:27:39,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-11 14:27:39,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:39,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-11 14:27:40,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-11 14:27:40,076 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:40,111 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:40,147 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:40,184 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:40,226 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:40,265 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:27:40,330 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-11 14:27:40,331 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:113, output treesize:121 [2019-01-11 14:27:40,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:40,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-11 14:27:40,432 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 14:27:40,457 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-11 14:27:42,148 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 45 dim-0 vars, and 9 xjuncts. [2019-01-11 14:27:42,149 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:131, output treesize:863 [2019-01-11 14:27:42,911 WARN L181 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 145 [2019-01-11 14:27:42,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:42,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:42,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:42,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:42,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:42,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:42,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:42,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:42,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:42,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 23 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 154 [2019-01-11 14:27:42,931 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:43,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 137 [2019-01-11 14:27:43,142 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:43,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:27:43,321 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:27:43,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 158 [2019-01-11 14:27:43,323 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 14:27:43,488 INFO L267 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 3 dim-1 vars, End of recursive call: 17 dim-0 vars, and 3 xjuncts. [2019-01-11 14:27:43,488 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 20 variables, input treesize:296, output treesize:248 [2019-01-11 14:27:46,556 WARN L181 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 143 [2019-01-11 14:27:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:27:46,562 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:27:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:27:46,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:27:46,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:27:46,636 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:27:46,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:27:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:27:46,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:27:46,637 INFO L87 Difference]: Start difference. First operand 236 states and 1823 transitions. Second operand 8 states. [2019-01-11 14:27:55,659 WARN L181 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2019-01-11 14:28:13,946 WARN L181 SmtUtils]: Spent 12.20 s on a formula simplification. DAG size of input: 155 DAG size of output: 116 [2019-01-11 14:28:28,326 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-11 14:28:28,330 INFO L168 Benchmark]: Toolchain (without parser) took 297740.11 ms. Allocated memory was 140.5 MB in the beginning and 221.2 MB in the end (delta: 80.7 MB). Free memory was 108.0 MB in the beginning and 157.7 MB in the end (delta: -49.6 MB). Peak memory consumption was 31.1 MB. Max. memory is 7.1 GB. [2019-01-11 14:28:28,330 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory is still 109.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 14:28:28,330 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.36 ms. Allocated memory is still 140.5 MB. Free memory was 107.8 MB in the beginning and 105.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-11 14:28:28,331 INFO L168 Benchmark]: Boogie Preprocessor took 25.70 ms. Allocated memory is still 140.5 MB. Free memory was 105.4 MB in the beginning and 104.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-11 14:28:28,331 INFO L168 Benchmark]: RCFGBuilder took 598.75 ms. Allocated memory is still 140.5 MB. Free memory was 104.1 MB in the beginning and 91.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-01-11 14:28:28,331 INFO L168 Benchmark]: TraceAbstraction took 297055.36 ms. Allocated memory was 140.5 MB in the beginning and 221.2 MB in the end (delta: 80.7 MB). Free memory was 90.8 MB in the beginning and 157.7 MB in the end (delta: -66.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-01-11 14:28:28,333 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory is still 109.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.36 ms. Allocated memory is still 140.5 MB. Free memory was 107.8 MB in the beginning and 105.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.70 ms. Allocated memory is still 140.5 MB. Free memory was 105.4 MB in the beginning and 104.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 598.75 ms. Allocated memory is still 140.5 MB. Free memory was 104.1 MB in the beginning and 91.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 297055.36 ms. Allocated memory was 140.5 MB in the beginning and 221.2 MB in the end (delta: 80.7 MB). Free memory was 90.8 MB in the beginning and 157.7 MB in the end (delta: -66.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...