java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1de736e-m [2019-02-18 10:07:35,043 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-18 10:07:35,045 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-18 10:07:35,058 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-02-18 10:07:35,058 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-02-18 10:07:35,059 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-02-18 10:07:35,061 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-02-18 10:07:35,063 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-02-18 10:07:35,065 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-02-18 10:07:35,066 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-02-18 10:07:35,067 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-02-18 10:07:35,067 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-02-18 10:07:35,068 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-02-18 10:07:35,069 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-02-18 10:07:35,070 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-02-18 10:07:35,071 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-02-18 10:07:35,072 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-02-18 10:07:35,074 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-02-18 10:07:35,076 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-02-18 10:07:35,078 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-02-18 10:07:35,079 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-02-18 10:07:35,080 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-02-18 10:07:35,083 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-02-18 10:07:35,083 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-02-18 10:07:35,083 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-02-18 10:07:35,084 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-02-18 10:07:35,086 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-02-18 10:07:35,087 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-02-18 10:07:35,087 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-02-18 10:07:35,089 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-02-18 10:07:35,089 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-02-18 10:07:35,090 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-02-18 10:07:35,090 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-02-18 10:07:35,090 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-02-18 10:07:35,092 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-02-18 10:07:35,092 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-02-18 10:07:35,093 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-02-18 10:07:35,106 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-18 10:07:35,106 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-18 10:07:35,107 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-18 10:07:35,107 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-18 10:07:35,107 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-18 10:07:35,107 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-18 10:07:35,108 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-18 10:07:35,108 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-18 10:07:35,108 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-18 10:07:35,108 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-02-18 10:07:35,108 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-02-18 10:07:35,109 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-18 10:07:35,109 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-18 10:07:35,110 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-18 10:07:35,110 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-18 10:07:35,110 INFO L133 SettingsManager]: * Use SBE=true [2019-02-18 10:07:35,110 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-18 10:07:35,111 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-18 10:07:35,111 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-18 10:07:35,111 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-18 10:07:35,111 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-18 10:07:35,111 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-18 10:07:35,112 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-18 10:07:35,112 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-18 10:07:35,112 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-18 10:07:35,112 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-18 10:07:35,112 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-18 10:07:35,113 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-18 10:07:35,113 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-18 10:07:35,113 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-18 10:07:35,113 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-02-18 10:07:35,114 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-18 10:07:35,114 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-18 10:07:35,114 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-18 10:07:35,114 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-18 10:07:35,114 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-18 10:07:35,115 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-02-18 10:07:35,115 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-18 10:07:35,115 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-18 10:07:35,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-18 10:07:35,158 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-18 10:07:35,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-18 10:07:35,164 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-18 10:07:35,164 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-18 10:07:35,165 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl [2019-02-18 10:07:35,165 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl' [2019-02-18 10:07:35,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-18 10:07:35,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-18 10:07:35,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-18 10:07:35,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-18 10:07:35,209 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-18 10:07:35,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/1) ... [2019-02-18 10:07:35,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/1) ... [2019-02-18 10:07:35,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-18 10:07:35,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-18 10:07:35,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-18 10:07:35,268 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-18 10:07:35,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/1) ... [2019-02-18 10:07:35,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/1) ... [2019-02-18 10:07:35,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/1) ... [2019-02-18 10:07:35,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/1) ... [2019-02-18 10:07:35,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/1) ... [2019-02-18 10:07:35,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/1) ... [2019-02-18 10:07:35,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/1) ... [2019-02-18 10:07:35,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-18 10:07:35,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-18 10:07:35,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-18 10:07:35,293 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-18 10:07:35,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (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:8092 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-02-18 10:07:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-18 10:07:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-18 10:07:35,718 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-18 10:07:35,718 INFO L286 CfgBuilder]: Removed 15 assue(true) statements. [2019-02-18 10:07:35,725 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:07:35 BoogieIcfgContainer [2019-02-18 10:07:35,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-18 10:07:35,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-18 10:07:35,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-18 10:07:35,737 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-18 10:07:35,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 10:07:35" (1/2) ... [2019-02-18 10:07:35,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d61c343 and model type speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:07:35, skipping insertion in model container [2019-02-18 10:07:35,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:07:35" (2/2) ... [2019-02-18 10:07:35,742 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-6-unlimited.bpl [2019-02-18 10:07:35,752 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-18 10:07:35,760 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-02-18 10:07:35,778 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-02-18 10:07:35,811 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-18 10:07:35,812 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-18 10:07:35,812 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-18 10:07:35,812 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-18 10:07:35,812 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-18 10:07:35,812 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-18 10:07:35,813 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-18 10:07:35,813 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-18 10:07:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-02-18 10:07:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-18 10:07:35,845 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:35,846 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-18 10:07:35,850 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:35,859 INFO L82 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2019-02-18 10:07:35,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:35,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:35,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:35,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:35,912 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:36,050 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 10:07:36,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-18 10:07:36,051 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 10:07:36,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-18 10:07:36,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-18 10:07:36,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 10:07:36,070 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-02-18 10:07:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:36,304 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-02-18 10:07:36,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 10:07:36,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-18 10:07:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:36,319 INFO L225 Difference]: With dead ends: 29 [2019-02-18 10:07:36,320 INFO L226 Difference]: Without dead ends: 24 [2019-02-18 10:07:36,323 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 10:07:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-02-18 10:07:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2019-02-18 10:07:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-02-18 10:07:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 25 transitions. [2019-02-18 10:07:36,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 25 transitions. Word has length 2 [2019-02-18 10:07:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:36,362 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 25 transitions. [2019-02-18 10:07:36,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-18 10:07:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 25 transitions. [2019-02-18 10:07:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:07:36,363 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:36,363 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:07:36,363 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2019-02-18 10:07:36,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:36,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:36,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:36,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:36,366 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:36,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:36,517 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:36,518 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 10:07:36,520 INFO L207 CegarAbsIntRunner]: [0], [18], [27] [2019-02-18 10:07:36,594 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:36,594 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:37,660 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:37,661 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:07:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:37,668 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:37,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:37,668 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:37,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:37,682 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:37,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:37,852 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-02-18 10:07:37,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:37,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:07:38,190 WARN L181 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-02-18 10:07:38,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:07:38,386 WARN L181 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2019-02-18 10:07:38,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,491 INFO L303 Elim1Store]: Index analysis took 102 ms [2019-02-18 10:07:38,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:07:38,728 WARN L181 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2019-02-18 10:07:38,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:38,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:07:38,747 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:38,838 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:38,868 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:38,900 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:38,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:38,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:39,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:39,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:39,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:39,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:07:39,130 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:39,232 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:39,478 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:39,642 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:39,659 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:39,675 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:39,716 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:39,717 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-02-18 10:07:39,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:39,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:07:39,860 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:39,930 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:39,931 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-02-18 10:07:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:39,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:40,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:07:40,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:07:40,070 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:07:40,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:07:40,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:07:40,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:07:40,071 INFO L87 Difference]: Start difference. First operand 14 states and 25 transitions. Second operand 6 states. [2019-02-18 10:07:40,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:40,494 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-02-18 10:07:40,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:07:40,495 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 10:07:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:40,496 INFO L225 Difference]: With dead ends: 47 [2019-02-18 10:07:40,496 INFO L226 Difference]: Without dead ends: 45 [2019-02-18 10:07:40,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 10:07:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-02-18 10:07:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 18. [2019-02-18 10:07:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-02-18 10:07:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 37 transitions. [2019-02-18 10:07:40,503 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 37 transitions. Word has length 3 [2019-02-18 10:07:40,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:40,504 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 37 transitions. [2019-02-18 10:07:40,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:07:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 37 transitions. [2019-02-18 10:07:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:07:40,504 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:40,505 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:07:40,505 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash 30004, now seen corresponding path program 1 times [2019-02-18 10:07:40,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:40,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:40,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:40,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:40,507 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:40,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:40,613 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:40,613 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 10:07:40,613 INFO L207 CegarAbsIntRunner]: [0], [6], [27] [2019-02-18 10:07:40,618 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:40,618 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:41,044 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:41,044 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:07:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:41,045 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:41,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:41,045 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:41,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:41,063 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:41,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:41,233 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-02-18 10:07:41,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:41,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:41,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,335 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:41,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:41,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:41,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:07:41,494 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:41,559 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:41,592 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:41,615 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:41,656 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:41,681 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:41,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:07:41,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:07:41,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:07:41,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,924 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:41,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:07:41,928 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:41,946 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:41,968 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:41,991 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:42,027 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:42,028 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:72, output treesize:71 [2019-02-18 10:07:42,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:42,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:07:42,082 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:42,120 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:42,121 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-02-18 10:07:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:42,144 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:42,170 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-18 10:07:42,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-18 10:07:42,170 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 10:07:42,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-18 10:07:42,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-18 10:07:42,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 10:07:42,171 INFO L87 Difference]: Start difference. First operand 18 states and 37 transitions. Second operand 4 states. [2019-02-18 10:07:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:42,264 INFO L93 Difference]: Finished difference Result 23 states and 60 transitions. [2019-02-18 10:07:42,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-18 10:07:42,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-18 10:07:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:42,266 INFO L225 Difference]: With dead ends: 23 [2019-02-18 10:07:42,266 INFO L226 Difference]: Without dead ends: 22 [2019-02-18 10:07:42,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 10:07:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-02-18 10:07:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-02-18 10:07:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-02-18 10:07:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 59 transitions. [2019-02-18 10:07:42,275 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 59 transitions. Word has length 3 [2019-02-18 10:07:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:42,275 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 59 transitions. [2019-02-18 10:07:42,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-18 10:07:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 59 transitions. [2019-02-18 10:07:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:07:42,276 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:42,276 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:07:42,277 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash 30562, now seen corresponding path program 1 times [2019-02-18 10:07:42,277 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:42,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:42,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:42,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:42,278 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:42,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:42,395 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:42,395 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 10:07:42,395 INFO L207 CegarAbsIntRunner]: [0], [24], [27] [2019-02-18 10:07:42,397 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:42,397 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:45,272 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:45,273 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:07:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:45,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:45,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:45,274 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:45,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:45,293 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:45,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:45,520 WARN L181 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-02-18 10:07:45,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:07:45,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:07:45,685 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2019-02-18 10:07:45,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:07:45,759 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,759 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,760 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,761 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:07:45,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:45,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:07:45,852 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:45,884 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:45,914 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:45,945 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:45,992 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:46,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:46,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:46,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:46,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:46,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:46,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:07:46,113 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:46,170 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:46,246 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:46,326 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:46,341 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:46,354 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:46,423 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:46,424 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2019-02-18 10:07:46,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:46,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:07:46,454 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:46,505 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:46,505 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-02-18 10:07:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:46,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:46,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:07:46,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:07:46,571 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:07:46,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:07:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:07:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:07:46,572 INFO L87 Difference]: Start difference. First operand 21 states and 59 transitions. Second operand 6 states. [2019-02-18 10:07:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:46,783 INFO L93 Difference]: Finished difference Result 39 states and 79 transitions. [2019-02-18 10:07:46,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-18 10:07:46,784 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 10:07:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:46,785 INFO L225 Difference]: With dead ends: 39 [2019-02-18 10:07:46,786 INFO L226 Difference]: Without dead ends: 36 [2019-02-18 10:07:46,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:07:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-02-18 10:07:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2019-02-18 10:07:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-02-18 10:07:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 67 transitions. [2019-02-18 10:07:46,793 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 67 transitions. Word has length 3 [2019-02-18 10:07:46,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:46,794 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 67 transitions. [2019-02-18 10:07:46,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:07:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 67 transitions. [2019-02-18 10:07:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 10:07:46,795 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:46,795 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 10:07:46,795 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash 30128, now seen corresponding path program 1 times [2019-02-18 10:07:46,795 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:46,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:46,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:46,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:46,796 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:46,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:46,845 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:46,845 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 10:07:46,845 INFO L207 CegarAbsIntRunner]: [0], [10], [27] [2019-02-18 10:07:46,848 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:46,848 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:47,086 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:47,086 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:07:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:47,087 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:47,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:47,087 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:47,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:47,101 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:47,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:47,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:47,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:47,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:47,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,209 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:47,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,223 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,226 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:47,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:07:47,251 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,285 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,313 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,335 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,353 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,369 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:07:47,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,444 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:07:47,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,489 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:07:47,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:07:47,562 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,591 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,606 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,632 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,680 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:47,681 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-02-18 10:07:47,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:47,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:07:47,732 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:47,779 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:47,779 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-02-18 10:07:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:47,804 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:47,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:07:47,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:07:47,849 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:07:47,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:07:47,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:07:47,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:07:47,850 INFO L87 Difference]: Start difference. First operand 23 states and 67 transitions. Second operand 6 states. [2019-02-18 10:07:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:48,074 INFO L93 Difference]: Finished difference Result 49 states and 101 transitions. [2019-02-18 10:07:48,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:07:48,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 10:07:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:48,076 INFO L225 Difference]: With dead ends: 49 [2019-02-18 10:07:48,076 INFO L226 Difference]: Without dead ends: 47 [2019-02-18 10:07:48,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 10:07:48,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-02-18 10:07:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2019-02-18 10:07:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-02-18 10:07:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 80 transitions. [2019-02-18 10:07:48,083 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 80 transitions. Word has length 3 [2019-02-18 10:07:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:48,084 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 80 transitions. [2019-02-18 10:07:48,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:07:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 80 transitions. [2019-02-18 10:07:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:07:48,085 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:48,085 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:07:48,085 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash 941528, now seen corresponding path program 1 times [2019-02-18 10:07:48,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:48,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:48,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:48,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:48,087 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:48,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:48,162 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:48,162 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:07:48,163 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [27] [2019-02-18 10:07:48,164 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:48,165 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:48,484 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:48,484 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:07:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:48,485 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:48,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:48,485 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:48,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:48,494 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:48,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:48,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:48,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:48,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:48,575 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:48,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:48,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:07:48,608 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:48,640 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:48,702 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:48,722 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:48,738 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:48,751 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:48,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:07:48,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:07:48,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:07:48,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,949 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:48,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:07:48,952 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:48,970 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:48,988 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:49,005 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:49,044 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:49,045 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:07:49,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:49,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:07:49,098 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:49,133 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:49,134 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:07:49,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:49,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:49,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:49,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:49,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:49,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:49,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:49,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-02-18 10:07:49,199 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:49,261 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:49,261 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-02-18 10:07:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:49,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:49,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:07:49,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:07:49,326 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:07:49,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:07:49,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:07:49,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:07:49,326 INFO L87 Difference]: Start difference. First operand 25 states and 80 transitions. Second operand 8 states. [2019-02-18 10:07:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:49,913 INFO L93 Difference]: Finished difference Result 61 states and 138 transitions. [2019-02-18 10:07:49,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:07:49,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:07:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:49,916 INFO L225 Difference]: With dead ends: 61 [2019-02-18 10:07:49,916 INFO L226 Difference]: Without dead ends: 57 [2019-02-18 10:07:49,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:07:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-02-18 10:07:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-02-18 10:07:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-02-18 10:07:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 98 transitions. [2019-02-18 10:07:49,925 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 98 transitions. Word has length 4 [2019-02-18 10:07:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:49,926 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 98 transitions. [2019-02-18 10:07:49,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:07:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 98 transitions. [2019-02-18 10:07:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:07:49,927 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:49,927 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:07:49,927 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:49,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash 941590, now seen corresponding path program 1 times [2019-02-18 10:07:49,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:49,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:49,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:49,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:49,929 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:50,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:50,037 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:50,038 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:07:50,038 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [27] [2019-02-18 10:07:50,039 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:50,039 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:50,433 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:50,433 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:07:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:50,434 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:50,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:50,434 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:50,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:50,445 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:50,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:50,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:07:50,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:07:50,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,608 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,609 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,610 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:07:50,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,675 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 37 treesize of output 80 [2019-02-18 10:07:50,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,755 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,757 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,759 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,760 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,761 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:50,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:07:50,765 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:50,793 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:50,822 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:50,851 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:50,889 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:50,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:50,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:50,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:50,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:50,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:50,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:07:50,959 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:51,002 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:51,024 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:51,040 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:51,055 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:51,067 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:51,121 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:51,122 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-02-18 10:07:51,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:51,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:07:51,227 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:51,274 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:51,275 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-02-18 10:07:51,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:51,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:51,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:51,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:51,309 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:51,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:51,326 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:07:51,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-02-18 10:07:51,328 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:51,380 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:51,380 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-02-18 10:07:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:51,404 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:51,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:07:51,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:07:51,450 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:07:51,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:07:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:07:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:07:51,451 INFO L87 Difference]: Start difference. First operand 29 states and 98 transitions. Second operand 8 states. [2019-02-18 10:07:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:51,958 INFO L93 Difference]: Finished difference Result 59 states and 140 transitions. [2019-02-18 10:07:51,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:07:51,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:07:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:51,960 INFO L225 Difference]: With dead ends: 59 [2019-02-18 10:07:51,961 INFO L226 Difference]: Without dead ends: 55 [2019-02-18 10:07:51,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:07:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-02-18 10:07:51,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-02-18 10:07:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-18 10:07:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 110 transitions. [2019-02-18 10:07:51,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 110 transitions. Word has length 4 [2019-02-18 10:07:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:51,974 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 110 transitions. [2019-02-18 10:07:51,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:07:51,974 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 110 transitions. [2019-02-18 10:07:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:07:51,975 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:51,975 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:07:51,975 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:51,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:51,976 INFO L82 PathProgramCache]: Analyzing trace with hash 941156, now seen corresponding path program 1 times [2019-02-18 10:07:51,976 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:51,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:51,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:51,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:51,977 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:52,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:52,061 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:52,061 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:07:52,062 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [27] [2019-02-18 10:07:52,063 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:52,063 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:52,429 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:52,429 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:07:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:52,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:52,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:52,430 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:52,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:52,442 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:52,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:52,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:52,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:52,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,572 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:52,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:52,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,609 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,612 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,614 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:52,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:07:52,625 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:52,658 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:52,683 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:52,703 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:52,723 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:52,744 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:52,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:07:52,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:07:52,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:07:52,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:52,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:07:52,959 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:52,983 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:53,006 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:53,035 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:53,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:53,083 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:07:53,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:53,140 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:07:53,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:53,175 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:53,176 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:07:53,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:53,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:53,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:53,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:53,206 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:53,207 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:07:53,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-02-18 10:07:53,209 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:53,243 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:53,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2019-02-18 10:07:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:53,265 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:53,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:07:53,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:07:53,319 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:07:53,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:07:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:07:53,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:07:53,320 INFO L87 Difference]: Start difference. First operand 30 states and 110 transitions. Second operand 8 states. [2019-02-18 10:07:53,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:53,751 INFO L93 Difference]: Finished difference Result 57 states and 144 transitions. [2019-02-18 10:07:53,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:07:53,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:07:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:53,753 INFO L225 Difference]: With dead ends: 57 [2019-02-18 10:07:53,753 INFO L226 Difference]: Without dead ends: 55 [2019-02-18 10:07:53,754 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 [2019-02-18 10:07:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-02-18 10:07:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-02-18 10:07:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-18 10:07:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 109 transitions. [2019-02-18 10:07:53,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 109 transitions. Word has length 4 [2019-02-18 10:07:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:53,763 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 109 transitions. [2019-02-18 10:07:53,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:07:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 109 transitions. [2019-02-18 10:07:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:07:53,764 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:53,764 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:07:53,765 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:53,765 INFO L82 PathProgramCache]: Analyzing trace with hash 941280, now seen corresponding path program 1 times [2019-02-18 10:07:53,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:53,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:53,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:53,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:53,766 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:53,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:53,914 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:53,914 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:07:53,914 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [27] [2019-02-18 10:07:53,915 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:53,915 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:54,253 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:54,254 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:07:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:54,254 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:54,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:54,254 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:54,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:54,264 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:54,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:54,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:07:54,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:07:54,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:07:54,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,459 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,460 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:54,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:07:54,465 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:54,484 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:54,502 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:54,520 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:54,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:54,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:54,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:54,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:54,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:54,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:07:54,581 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:54,958 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:55,076 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:55,094 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:55,109 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:55,122 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:55,158 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:55,159 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:07:55,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:55,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:07:55,251 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:55,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:55,282 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:07:55,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:55,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:55,317 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:55,318 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:55,319 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:55,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:55,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:55,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:07:55,325 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:55,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:55,367 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-02-18 10:07:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:55,387 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:55,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:07:55,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:07:55,433 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:07:55,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:07:55,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:07:55,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:07:55,434 INFO L87 Difference]: Start difference. First operand 30 states and 109 transitions. Second operand 8 states. [2019-02-18 10:07:55,645 WARN L181 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-02-18 10:07:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:56,086 INFO L93 Difference]: Finished difference Result 57 states and 158 transitions. [2019-02-18 10:07:56,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:07:56,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:07:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:56,088 INFO L225 Difference]: With dead ends: 57 [2019-02-18 10:07:56,088 INFO L226 Difference]: Without dead ends: 53 [2019-02-18 10:07:56,089 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:07:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-02-18 10:07:56,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2019-02-18 10:07:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-02-18 10:07:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 126 transitions. [2019-02-18 10:07:56,101 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 126 transitions. Word has length 4 [2019-02-18 10:07:56,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:56,102 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 126 transitions. [2019-02-18 10:07:56,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:07:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 126 transitions. [2019-02-18 10:07:56,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:07:56,102 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:56,103 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:07:56,103 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash 929872, now seen corresponding path program 1 times [2019-02-18 10:07:56,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:56,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:56,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:56,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:56,105 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:56,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:56,192 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:56,192 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:07:56,192 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [27] [2019-02-18 10:07:56,194 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:56,194 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:56,506 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:56,506 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:07:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:56,506 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:56,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:56,507 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:56,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:56,517 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:56,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:56,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:07:56,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:07:56,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:07:56,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:56,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:07:56,716 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,736 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,752 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,771 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:56,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:56,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:56,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:56,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:56,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:07:56,823 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,851 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,874 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,894 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,910 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,924 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:56,965 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:56,965 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-02-18 10:07:57,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:57,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:07:57,015 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:57,052 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:57,052 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:07:57,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:57,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:57,077 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:57,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:57,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:57,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:57,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:57,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 10:07:57,084 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:57,125 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:57,126 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2019-02-18 10:07:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:57,145 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:57,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:07:57,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:07:57,181 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:07:57,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:07:57,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:07:57,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:07:57,182 INFO L87 Difference]: Start difference. First operand 31 states and 126 transitions. Second operand 8 states. [2019-02-18 10:07:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:57,570 INFO L93 Difference]: Finished difference Result 73 states and 228 transitions. [2019-02-18 10:07:57,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:07:57,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:07:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:57,572 INFO L225 Difference]: With dead ends: 73 [2019-02-18 10:07:57,572 INFO L226 Difference]: Without dead ends: 71 [2019-02-18 10:07:57,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:07:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-02-18 10:07:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 40. [2019-02-18 10:07:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-02-18 10:07:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 173 transitions. [2019-02-18 10:07:57,583 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 173 transitions. Word has length 4 [2019-02-18 10:07:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:57,584 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 173 transitions. [2019-02-18 10:07:57,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:07:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 173 transitions. [2019-02-18 10:07:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:07:57,584 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:57,585 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:07:57,585 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash 930184, now seen corresponding path program 1 times [2019-02-18 10:07:57,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:57,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:57,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:57,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:57,586 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:57,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:57,644 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:57,644 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:07:57,645 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [29] [2019-02-18 10:07:57,646 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:57,647 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:57,873 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:57,873 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:07:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:57,874 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:57,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:57,874 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:57,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:57,891 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:57,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:58,079 WARN L181 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-02-18 10:07:58,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:07:58,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:07:58,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:07:58,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,108 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:07:58,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,127 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:07:58,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:07:58,147 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,178 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,206 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,227 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,243 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,257 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:07:58,575 WARN L181 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-02-18 10:07:58,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,578 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:07:58,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,620 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:07:58,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:07:58,674 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,693 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,710 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,728 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,764 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:58,765 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-02-18 10:07:58,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:58,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:07:58,852 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:07:58,886 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:07:58,886 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-02-18 10:07:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:58,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:07:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:58,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:07:58,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:07:58,935 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:07:58,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:07:58,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:07:58,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:07:58,936 INFO L87 Difference]: Start difference. First operand 40 states and 173 transitions. Second operand 6 states. [2019-02-18 10:07:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:07:59,138 INFO L93 Difference]: Finished difference Result 56 states and 192 transitions. [2019-02-18 10:07:59,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:07:59,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 10:07:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:07:59,139 INFO L225 Difference]: With dead ends: 56 [2019-02-18 10:07:59,140 INFO L226 Difference]: Without dead ends: 55 [2019-02-18 10:07:59,140 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 10:07:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-02-18 10:07:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2019-02-18 10:07:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-02-18 10:07:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 180 transitions. [2019-02-18 10:07:59,151 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 180 transitions. Word has length 4 [2019-02-18 10:07:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:07:59,151 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 180 transitions. [2019-02-18 10:07:59,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:07:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 180 transitions. [2019-02-18 10:07:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:07:59,152 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:07:59,152 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:07:59,152 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:07:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash 945434, now seen corresponding path program 1 times [2019-02-18 10:07:59,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:07:59,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:59,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:59,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:07:59,153 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:07:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:07:59,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:59,229 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:07:59,230 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:07:59,230 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [27] [2019-02-18 10:07:59,234 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:07:59,234 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:07:59,650 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:07:59,650 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:07:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:07:59,651 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:07:59,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:07:59,651 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:07:59,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:07:59,667 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:07:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:07:59,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:07:59,790 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:07:59,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:07:59,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:07:59,968 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:07:59,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:08:00,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:08:00,086 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,137 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,172 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,209 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,244 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:00,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:00,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:00,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:00,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:00,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:08:00,349 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,394 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,415 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,433 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,447 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,461 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,511 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:00,511 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-02-18 10:08:00,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:08:00,560 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,609 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:00,610 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-02-18 10:08:00,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,758 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,759 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,759 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,760 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:00,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-02-18 10:08:00,761 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:00,817 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:00,818 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-02-18 10:08:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:00,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:00,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:00,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:08:00,880 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:00,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:08:00,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:08:00,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:08:00,881 INFO L87 Difference]: Start difference. First operand 42 states and 180 transitions. Second operand 8 states. [2019-02-18 10:08:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:01,376 INFO L93 Difference]: Finished difference Result 96 states and 313 transitions. [2019-02-18 10:08:01,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:08:01,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:08:01,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:01,379 INFO L225 Difference]: With dead ends: 96 [2019-02-18 10:08:01,379 INFO L226 Difference]: Without dead ends: 93 [2019-02-18 10:08:01,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-02-18 10:08:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-02-18 10:08:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2019-02-18 10:08:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-02-18 10:08:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 250 transitions. [2019-02-18 10:08:01,393 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 250 transitions. Word has length 4 [2019-02-18 10:08:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:01,393 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 250 transitions. [2019-02-18 10:08:01,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:08:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 250 transitions. [2019-02-18 10:08:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:08:01,394 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:01,394 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:08:01,395 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash 945000, now seen corresponding path program 1 times [2019-02-18 10:08:01,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:01,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:01,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:01,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:01,396 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:01,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:01,505 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:01,505 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:08:01,505 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [27] [2019-02-18 10:08:01,507 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:01,507 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:01,802 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:01,802 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:08:01,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:01,802 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:01,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:01,802 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:01,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:01,811 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:01,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:01,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:01,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:01,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:01,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:01,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:01,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:01,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:01,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:01,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:01,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:01,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:01,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:01,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:01,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:01,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:08:01,897 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:01,927 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:01,951 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:01,971 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:01,984 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:01,997 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:02,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:08:02,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:08:02,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:08:02,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,211 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,212 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:08:02,216 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:02,232 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:02,249 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:02,266 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:02,302 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:02,303 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:08:02,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:08:02,348 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:02,379 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:02,380 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:08:02,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:02,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-02-18 10:08:02,411 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:02,446 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:02,447 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2019-02-18 10:08:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:02,470 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:02,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:02,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:08:02,513 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:02,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:08:02,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:08:02,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:08:02,514 INFO L87 Difference]: Start difference. First operand 55 states and 250 transitions. Second operand 8 states. [2019-02-18 10:08:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:03,021 INFO L93 Difference]: Finished difference Result 84 states and 299 transitions. [2019-02-18 10:08:03,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:08:03,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:08:03,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:03,023 INFO L225 Difference]: With dead ends: 84 [2019-02-18 10:08:03,023 INFO L226 Difference]: Without dead ends: 82 [2019-02-18 10:08:03,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:08:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-02-18 10:08:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2019-02-18 10:08:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-02-18 10:08:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 270 transitions. [2019-02-18 10:08:03,039 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 270 transitions. Word has length 4 [2019-02-18 10:08:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:03,039 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 270 transitions. [2019-02-18 10:08:03,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:08:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 270 transitions. [2019-02-18 10:08:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:08:03,040 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:03,040 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:08:03,041 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:03,041 INFO L82 PathProgramCache]: Analyzing trace with hash 946922, now seen corresponding path program 1 times [2019-02-18 10:08:03,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:03,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:03,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:03,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:03,042 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:03,180 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-02-18 10:08:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:03,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:03,199 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:03,199 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:08:03,200 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [27] [2019-02-18 10:08:03,202 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:03,202 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:03,882 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:03,882 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:08:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:03,883 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:03,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:03,883 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:03,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:03,891 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:03,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:03,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:03,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:03,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:03,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,964 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:03,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:03,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,992 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:03,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:08:03,995 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,042 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,067 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,087 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,104 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,119 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:08:04,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:08:04,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:08:04,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:08:04,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:08:04,386 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,413 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,440 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,468 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,507 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,555 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:04,555 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-02-18 10:08:04,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:08:04,641 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,691 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:04,691 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-02-18 10:08:04,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,748 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,748 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:04,753 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:04,754 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-02-18 10:08:04,755 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:04,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:04,807 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-02-18 10:08:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:04,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:04,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:04,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:08:04,873 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:04,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:08:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:08:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:08:04,874 INFO L87 Difference]: Start difference. First operand 58 states and 270 transitions. Second operand 8 states. [2019-02-18 10:08:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:05,634 INFO L93 Difference]: Finished difference Result 91 states and 313 transitions. [2019-02-18 10:08:05,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:08:05,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:08:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:05,636 INFO L225 Difference]: With dead ends: 91 [2019-02-18 10:08:05,636 INFO L226 Difference]: Without dead ends: 89 [2019-02-18 10:08:05,636 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:08:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-02-18 10:08:05,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2019-02-18 10:08:05,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-02-18 10:08:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 277 transitions. [2019-02-18 10:08:05,649 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 277 transitions. Word has length 4 [2019-02-18 10:08:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:05,649 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 277 transitions. [2019-02-18 10:08:05,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:08:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 277 transitions. [2019-02-18 10:08:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:08:05,650 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:05,650 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:08:05,650 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash 934028, now seen corresponding path program 1 times [2019-02-18 10:08:05,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:05,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:05,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:05,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:05,652 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:05,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:05,714 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:05,714 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:08:05,715 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [29] [2019-02-18 10:08:05,715 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:05,715 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:05,880 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:05,881 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:08:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:05,881 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:05,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:05,881 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:05,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:05,892 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:05,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:05,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:05,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:08:05,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:05,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:05,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:08:05,931 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:05,933 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:05,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:05,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:08:05,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:05,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:05,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:05,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:05,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:08:05,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:08:05,970 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,008 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,031 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,047 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,061 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,076 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:08:06,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:08:06,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:08:06,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:08:06,206 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,221 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,237 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,254 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:06,288 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:06,288 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:64, output treesize:67 [2019-02-18 10:08:06,312 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:06,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:08:06,323 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:08:06,423 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:08:06,423 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:92 [2019-02-18 10:08:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:06,474 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:06,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-18 10:08:06,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-18 10:08:06,500 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 10:08:06,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-18 10:08:06,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-18 10:08:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 10:08:06,501 INFO L87 Difference]: Start difference. First operand 59 states and 277 transitions. Second operand 4 states. [2019-02-18 10:08:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:06,568 INFO L93 Difference]: Finished difference Result 90 states and 454 transitions. [2019-02-18 10:08:06,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-18 10:08:06,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-02-18 10:08:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:06,570 INFO L225 Difference]: With dead ends: 90 [2019-02-18 10:08:06,570 INFO L226 Difference]: Without dead ends: 89 [2019-02-18 10:08:06,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 10:08:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-02-18 10:08:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2019-02-18 10:08:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-02-18 10:08:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 449 transitions. [2019-02-18 10:08:06,589 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 449 transitions. Word has length 4 [2019-02-18 10:08:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:06,589 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 449 transitions. [2019-02-18 10:08:06,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-18 10:08:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 449 transitions. [2019-02-18 10:08:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:08:06,590 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:06,590 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:08:06,591 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash 933592, now seen corresponding path program 1 times [2019-02-18 10:08:06,591 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:06,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:06,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:06,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:06,592 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:06,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:06,717 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:06,717 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:08:06,717 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [27] [2019-02-18 10:08:06,718 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:06,719 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:06,956 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:06,956 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:08:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:06,957 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:06,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:06,957 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:06,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:06,965 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:06,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:07,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,002 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:08:07,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:08:07,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:08:07,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,166 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:08:07,167 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,191 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,216 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,242 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:07,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:07,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:07,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:07,291 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 30 treesize of output 72 [2019-02-18 10:08:07,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:08:07,315 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,359 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,379 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,397 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,411 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,424 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,459 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:07,460 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:08:07,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:08:07,497 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,529 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:07,530 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:08:07,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:07,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:08:07,558 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:07,594 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:07,595 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-02-18 10:08:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:07,611 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:07,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:07,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:08:07,656 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:07,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:08:07,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:08:07,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:08:07,657 INFO L87 Difference]: Start difference. First operand 83 states and 449 transitions. Second operand 8 states. [2019-02-18 10:08:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:08,082 INFO L93 Difference]: Finished difference Result 121 states and 532 transitions. [2019-02-18 10:08:08,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:08:08,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 10:08:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:08,085 INFO L225 Difference]: With dead ends: 121 [2019-02-18 10:08:08,085 INFO L226 Difference]: Without dead ends: 119 [2019-02-18 10:08:08,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:08:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-02-18 10:08:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2019-02-18 10:08:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-02-18 10:08:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2019-02-18 10:08:08,102 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2019-02-18 10:08:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:08,103 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2019-02-18 10:08:08,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:08:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2019-02-18 10:08:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 10:08:08,104 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:08,104 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 10:08:08,105 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash 937872, now seen corresponding path program 1 times [2019-02-18 10:08:08,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:08,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:08,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:08,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:08,106 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:08,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:08,263 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:08,264 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 10:08:08,264 INFO L207 CegarAbsIntRunner]: [0], [14], [28], [29] [2019-02-18 10:08:08,265 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:08,265 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:08,422 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:08,422 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:08:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:08,423 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:08,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:08,423 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:08,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:08,431 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:08,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:08,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:08,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:08:08,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:08:08,460 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:08:08,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:08:08,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:08:08,502 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,539 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,562 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,580 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,594 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,609 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:08:08,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,652 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:08:08,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,691 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:08:08,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:08:08,745 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,760 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,776 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,794 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,827 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:08,828 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-02-18 10:08:08,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:08,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-02-18 10:08:08,861 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:08,892 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:08,892 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:46 [2019-02-18 10:08:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:08,908 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:08,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:08,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:08:08,948 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:08,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:08:08,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:08:08,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:08:08,949 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 6 states. [2019-02-18 10:08:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:09,195 INFO L93 Difference]: Finished difference Result 110 states and 511 transitions. [2019-02-18 10:08:09,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:08:09,195 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 10:08:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:09,197 INFO L225 Difference]: With dead ends: 110 [2019-02-18 10:08:09,197 INFO L226 Difference]: Without dead ends: 109 [2019-02-18 10:08:09,198 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 10:08:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-02-18 10:08:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2019-02-18 10:08:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-02-18 10:08:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2019-02-18 10:08:09,211 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2019-02-18 10:08:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:09,211 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2019-02-18 10:08:09,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:08:09,212 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2019-02-18 10:08:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:09,212 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:09,213 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-02-18 10:08:09,213 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash 29182900, now seen corresponding path program 2 times [2019-02-18 10:08:09,213 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:09,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:09,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:09,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:09,214 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:09,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:09,302 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:09,302 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:08:09,302 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:08:09,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:09,302 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:09,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:08:09,312 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:08:09,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:08:09,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:08:09,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:09,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:09,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:09,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:09,363 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,365 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,366 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:09,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,375 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:09,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:08:09,409 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:09,456 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:09,722 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:09,741 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:09,758 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:09,773 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:09,808 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:08:09,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:08:09,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:08:09,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:09,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:08:10,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,035 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,038 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:08:10,043 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:10,070 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:10,099 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:10,127 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:10,156 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:10,207 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:10,208 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2019-02-18 10:08:10,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:08:10,234 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:10,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:10,281 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-02-18 10:08:10,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,309 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,312 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 103 [2019-02-18 10:08:10,313 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:10,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:10,367 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:71 [2019-02-18 10:08:10,389 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:10,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:08:10,397 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:10,454 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:10,454 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-02-18 10:08:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:10,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:11,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:11,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:08:11,237 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:11,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:08:11,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:08:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:08:11,238 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 10 states. [2019-02-18 10:08:12,220 WARN L181 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2019-02-18 10:08:12,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:12,857 INFO L93 Difference]: Finished difference Result 133 states and 606 transitions. [2019-02-18 10:08:12,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:08:12,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:08:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:12,860 INFO L225 Difference]: With dead ends: 133 [2019-02-18 10:08:12,860 INFO L226 Difference]: Without dead ends: 128 [2019-02-18 10:08:12,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:08:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-02-18 10:08:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2019-02-18 10:08:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-02-18 10:08:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 538 transitions. [2019-02-18 10:08:12,877 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 538 transitions. Word has length 5 [2019-02-18 10:08:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:12,877 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 538 transitions. [2019-02-18 10:08:12,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:08:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 538 transitions. [2019-02-18 10:08:12,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:12,878 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:12,878 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:12,879 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:12,879 INFO L82 PathProgramCache]: Analyzing trace with hash 29172052, now seen corresponding path program 1 times [2019-02-18 10:08:12,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:12,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:12,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:08:12,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:12,880 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:12,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:12,975 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:12,975 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:12,976 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [29] [2019-02-18 10:08:12,977 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:12,977 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:13,273 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:13,273 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:08:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:13,273 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:13,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:13,274 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:13,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:13,282 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:13,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:13,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:13,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:13,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:13,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,332 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:13,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:13,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:08:13,389 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,425 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,452 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,474 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,490 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,507 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:08:13,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:08:13,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:08:13,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:08:13,705 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,730 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,756 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,770 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:13,806 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:08:13,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:08:13,844 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:13,875 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:08:13,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,903 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,904 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,905 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,906 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:13,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:08:13,908 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:13,944 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:13,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-02-18 10:08:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:14,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:14,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:14,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:08:14,050 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:14,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:08:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:08:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:08:14,051 INFO L87 Difference]: Start difference. First operand 95 states and 538 transitions. Second operand 8 states. [2019-02-18 10:08:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:14,418 INFO L93 Difference]: Finished difference Result 125 states and 622 transitions. [2019-02-18 10:08:14,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:08:14,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-02-18 10:08:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:14,421 INFO L225 Difference]: With dead ends: 125 [2019-02-18 10:08:14,422 INFO L226 Difference]: Without dead ends: 124 [2019-02-18 10:08:14,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:08:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-02-18 10:08:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2019-02-18 10:08:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-02-18 10:08:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 589 transitions. [2019-02-18 10:08:14,442 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 589 transitions. Word has length 5 [2019-02-18 10:08:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:14,442 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 589 transitions. [2019-02-18 10:08:14,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:08:14,442 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 589 transitions. [2019-02-18 10:08:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:14,443 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:14,443 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:14,444 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:14,444 INFO L82 PathProgramCache]: Analyzing trace with hash 29187302, now seen corresponding path program 1 times [2019-02-18 10:08:14,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:14,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:14,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:14,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:14,445 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:15,089 WARN L181 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-02-18 10:08:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:15,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:15,150 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:15,150 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:15,150 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [27] [2019-02-18 10:08:15,151 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:15,152 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:15,562 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:15,562 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:08:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:15,563 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:15,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:15,563 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:15,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:15,581 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:15,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:15,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:08:15,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,689 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 58 treesize of output 67 [2019-02-18 10:08:15,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,738 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 46 treesize of output 72 [2019-02-18 10:08:15,792 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:08:15,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:15,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:08:15,875 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:15,905 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:15,947 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:15,977 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,006 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:16,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:16,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:16,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:16,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:16,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:08:16,066 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,103 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,124 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,141 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,156 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,169 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,218 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:16,218 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:08:16,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:08:16,264 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,309 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:16,309 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:08:16,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-02-18 10:08:16,352 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,403 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:16,404 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-02-18 10:08:16,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,433 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,435 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,437 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,438 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,439 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,440 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,441 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,443 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,444 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,444 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:16,445 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:16,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-02-18 10:08:16,447 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:16,501 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:16,502 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-02-18 10:08:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:16,525 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:16,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:16,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:08:16,594 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:16,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:08:16,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:08:16,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:08:16,595 INFO L87 Difference]: Start difference. First operand 102 states and 589 transitions. Second operand 10 states. [2019-02-18 10:08:16,735 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2019-02-18 10:08:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:18,255 INFO L93 Difference]: Finished difference Result 149 states and 665 transitions. [2019-02-18 10:08:18,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:08:18,256 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:08:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:18,258 INFO L225 Difference]: With dead ends: 149 [2019-02-18 10:08:18,258 INFO L226 Difference]: Without dead ends: 145 [2019-02-18 10:08:18,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:08:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-02-18 10:08:18,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2019-02-18 10:08:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-02-18 10:08:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 605 transitions. [2019-02-18 10:08:18,279 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 605 transitions. Word has length 5 [2019-02-18 10:08:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:18,279 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 605 transitions. [2019-02-18 10:08:18,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:08:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 605 transitions. [2019-02-18 10:08:18,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:18,280 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:18,280 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:18,281 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:18,281 INFO L82 PathProgramCache]: Analyzing trace with hash 29186868, now seen corresponding path program 1 times [2019-02-18 10:08:18,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:18,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:18,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:18,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:18,282 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:18,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:18,378 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:18,379 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:18,379 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [27] [2019-02-18 10:08:18,380 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:18,380 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:18,927 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:18,927 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:08:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:18,928 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:18,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:18,928 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:18,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:18,948 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:18,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:19,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:19,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:19,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:19,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:19,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:19,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:08:19,103 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,136 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,160 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,179 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,195 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,210 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:08:19,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:08:19,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,316 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,317 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,318 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:08:19,363 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,364 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,366 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:08:19,370 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,386 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,402 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,420 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,456 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:19,457 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:08:19,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:08:19,517 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,548 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:19,548 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-02-18 10:08:19,573 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,575 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,576 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,580 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-02-18 10:08:19,581 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,615 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:19,616 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-02-18 10:08:19,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,646 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,647 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,651 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,651 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:19,652 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:19,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-02-18 10:08:19,654 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:19,703 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:19,703 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-02-18 10:08:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:19,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:19,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:19,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:08:19,784 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:19,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:08:19,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:08:19,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:08:19,785 INFO L87 Difference]: Start difference. First operand 105 states and 605 transitions. Second operand 10 states. [2019-02-18 10:08:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:20,346 INFO L93 Difference]: Finished difference Result 138 states and 662 transitions. [2019-02-18 10:08:20,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:08:20,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:08:20,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:20,349 INFO L225 Difference]: With dead ends: 138 [2019-02-18 10:08:20,350 INFO L226 Difference]: Without dead ends: 136 [2019-02-18 10:08:20,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:08:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-02-18 10:08:20,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2019-02-18 10:08:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-02-18 10:08:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-02-18 10:08:20,370 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 5 [2019-02-18 10:08:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:20,370 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-02-18 10:08:20,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:08:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-02-18 10:08:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:20,371 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:20,371 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:20,372 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:20,372 INFO L82 PathProgramCache]: Analyzing trace with hash 29188666, now seen corresponding path program 1 times [2019-02-18 10:08:20,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:20,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:20,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:20,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:20,373 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:20,750 WARN L181 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2019-02-18 10:08:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:21,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:21,077 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:21,077 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:21,077 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [27] [2019-02-18 10:08:21,083 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:21,083 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:21,536 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:21,536 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:08:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:21,536 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:21,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:21,537 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:21,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:21,554 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:21,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:21,687 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-02-18 10:08:21,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:08:21,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:08:21,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,776 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,779 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:08:21,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:08:21,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,911 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,913 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,914 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:21,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:08:21,920 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:21,947 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:21,975 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,004 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,033 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:22,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:22,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:22,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:22,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:22,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:08:22,117 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,154 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,176 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,194 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,208 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,221 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,270 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:22,270 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-02-18 10:08:22,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:08:22,298 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,344 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:22,344 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-02-18 10:08:22,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,372 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,375 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:22,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-02-18 10:08:22,376 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,426 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:22,427 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-02-18 10:08:22,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,458 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,459 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,460 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:22,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-02-18 10:08:22,464 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:22,538 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:22,538 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-02-18 10:08:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:22,557 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:22,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:22,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:08:22,608 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:22,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:08:22,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:08:22,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:08:22,609 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 10 states. [2019-02-18 10:08:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:23,244 INFO L93 Difference]: Finished difference Result 152 states and 738 transitions. [2019-02-18 10:08:23,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:08:23,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:08:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:23,249 INFO L225 Difference]: With dead ends: 152 [2019-02-18 10:08:23,249 INFO L226 Difference]: Without dead ends: 151 [2019-02-18 10:08:23,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:08:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-02-18 10:08:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2019-02-18 10:08:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-02-18 10:08:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 612 transitions. [2019-02-18 10:08:23,271 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 612 transitions. Word has length 5 [2019-02-18 10:08:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:23,271 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 612 transitions. [2019-02-18 10:08:23,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:08:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 612 transitions. [2019-02-18 10:08:23,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:23,272 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:23,272 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:23,272 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash 29188790, now seen corresponding path program 1 times [2019-02-18 10:08:23,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:23,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:23,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:23,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:23,274 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:23,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:23,407 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:23,407 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:23,407 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [27] [2019-02-18 10:08:23,408 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:23,408 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:23,731 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:23,731 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:08:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:23,731 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:23,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:23,731 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:23,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:23,739 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:23,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:23,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:08:23,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:08:23,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:08:23,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,983 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:23,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:08:24,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:08:24,066 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,100 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,135 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,169 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,202 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:24,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:24,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:24,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:24,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:24,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:08:24,263 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,302 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,323 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,340 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,354 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,366 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,416 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:24,417 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:08:24,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:08:24,457 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,505 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:24,505 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:08:24,535 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,536 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,537 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,539 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,540 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,541 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:24,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-02-18 10:08:24,543 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,594 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:24,595 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-02-18 10:08:24,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:24,629 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:24,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 108 [2019-02-18 10:08:24,631 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:24,829 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:24,829 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2019-02-18 10:08:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:26,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:26,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:26,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:08:26,281 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:26,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:08:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:08:26,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:08:26,282 INFO L87 Difference]: Start difference. First operand 106 states and 612 transitions. Second operand 10 states. [2019-02-18 10:08:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:27,053 INFO L93 Difference]: Finished difference Result 141 states and 665 transitions. [2019-02-18 10:08:27,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:08:27,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:08:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:27,056 INFO L225 Difference]: With dead ends: 141 [2019-02-18 10:08:27,056 INFO L226 Difference]: Without dead ends: 140 [2019-02-18 10:08:27,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:08:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-02-18 10:08:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2019-02-18 10:08:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-02-18 10:08:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 619 transitions. [2019-02-18 10:08:27,078 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 619 transitions. Word has length 5 [2019-02-18 10:08:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:27,078 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 619 transitions. [2019-02-18 10:08:27,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:08:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 619 transitions. [2019-02-18 10:08:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:27,079 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:27,079 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:27,080 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:27,080 INFO L82 PathProgramCache]: Analyzing trace with hash 29175212, now seen corresponding path program 1 times [2019-02-18 10:08:27,080 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:27,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:27,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:27,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:27,081 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:27,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:27,207 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:27,207 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:27,207 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [27] [2019-02-18 10:08:27,208 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:27,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:27,835 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:27,836 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:08:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:27,836 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:27,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:27,837 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:27,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:27,859 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:27,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:28,051 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-02-18 10:08:28,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:28,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:28,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:28,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:28,267 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:28,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:08:28,290 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,322 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,346 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,365 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,381 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,395 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,424 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:08:28,460 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,462 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:08:28,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:08:28,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:08:28,554 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,570 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,597 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,619 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,659 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:28,659 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:08:28,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:08:28,712 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,747 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:28,748 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:08:28,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,776 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,783 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:28,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-02-18 10:08:28,784 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,832 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:28,832 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2019-02-18 10:08:28,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,879 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:28,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2019-02-18 10:08:28,888 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:28,936 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:28,936 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2019-02-18 10:08:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:28,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:29,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:29,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:08:29,008 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:29,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:08:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:08:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:08:29,009 INFO L87 Difference]: Start difference. First operand 107 states and 619 transitions. Second operand 10 states. [2019-02-18 10:08:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:29,686 INFO L93 Difference]: Finished difference Result 163 states and 816 transitions. [2019-02-18 10:08:29,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:08:29,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:08:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:29,689 INFO L225 Difference]: With dead ends: 163 [2019-02-18 10:08:29,689 INFO L226 Difference]: Without dead ends: 162 [2019-02-18 10:08:29,690 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:08:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-02-18 10:08:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 116. [2019-02-18 10:08:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-02-18 10:08:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 682 transitions. [2019-02-18 10:08:29,709 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 682 transitions. Word has length 5 [2019-02-18 10:08:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:29,709 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 682 transitions. [2019-02-18 10:08:29,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:08:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 682 transitions. [2019-02-18 10:08:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:29,710 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:29,710 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:29,710 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:29,710 INFO L82 PathProgramCache]: Analyzing trace with hash 29179614, now seen corresponding path program 1 times [2019-02-18 10:08:29,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:29,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:29,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:29,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:29,712 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:29,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:29,793 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:29,794 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:29,794 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [27] [2019-02-18 10:08:29,795 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:29,796 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:30,113 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:30,113 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:08:30,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:30,114 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:30,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:30,114 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:30,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:30,122 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:30,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:30,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:08:30,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,215 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:08:30,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:08:30,319 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,319 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,322 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:08:30,520 WARN L181 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-02-18 10:08:30,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,527 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,528 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,529 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,531 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,532 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,533 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:08:30,534 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,565 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,593 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,622 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,652 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:30,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:30,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:30,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:30,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:30,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:08:30,702 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,740 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,762 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,779 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,794 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,806 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,855 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:30,856 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:08:30,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:30,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:08:30,917 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:30,963 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:30,963 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:08:31,000 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:08:31,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:31,074 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:31,075 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-02-18 10:08:31,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,113 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:31,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:31,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-02-18 10:08:31,115 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:31,169 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:31,170 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-02-18 10:08:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:31,192 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:31,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:31,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:08:31,254 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:31,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:08:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:08:31,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:08:31,255 INFO L87 Difference]: Start difference. First operand 116 states and 682 transitions. Second operand 10 states. [2019-02-18 10:08:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:31,959 INFO L93 Difference]: Finished difference Result 163 states and 796 transitions. [2019-02-18 10:08:31,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:08:31,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:08:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:31,962 INFO L225 Difference]: With dead ends: 163 [2019-02-18 10:08:31,962 INFO L226 Difference]: Without dead ends: 160 [2019-02-18 10:08:31,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:08:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-02-18 10:08:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 122. [2019-02-18 10:08:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-02-18 10:08:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 724 transitions. [2019-02-18 10:08:31,988 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 724 transitions. Word has length 5 [2019-02-18 10:08:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:31,988 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 724 transitions. [2019-02-18 10:08:31,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:08:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 724 transitions. [2019-02-18 10:08:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:31,989 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:31,989 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:31,989 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:31,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash 29179180, now seen corresponding path program 1 times [2019-02-18 10:08:31,990 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:31,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:31,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:31,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:31,991 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:32,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:32,090 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:32,090 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:32,090 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [27] [2019-02-18 10:08:32,092 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:32,092 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:32,367 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:32,367 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:08:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:32,368 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:32,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:32,368 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:32,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:32,376 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:32,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:32,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:08:32,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:08:32,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:08:32,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:08:32,554 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,571 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,588 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,606 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:32,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:32,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:32,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:32,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:32,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:08:32,653 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,682 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,704 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,721 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,736 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,748 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:32,784 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:08:32,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:08:32,877 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,926 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:32,926 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-02-18 10:08:32,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:32,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:08:32,961 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:32,998 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:32,998 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-02-18 10:08:33,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,029 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,030 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,031 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,032 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,033 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:33,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:33,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-02-18 10:08:33,036 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:33,074 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:33,074 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-02-18 10:08:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:33,133 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:33,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:33,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:08:33,191 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:33,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:08:33,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:08:33,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:08:33,192 INFO L87 Difference]: Start difference. First operand 122 states and 724 transitions. Second operand 10 states. [2019-02-18 10:08:33,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:33,790 INFO L93 Difference]: Finished difference Result 165 states and 829 transitions. [2019-02-18 10:08:33,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:08:33,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:08:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:33,792 INFO L225 Difference]: With dead ends: 165 [2019-02-18 10:08:33,793 INFO L226 Difference]: Without dead ends: 163 [2019-02-18 10:08:33,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:08:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-02-18 10:08:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2019-02-18 10:08:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-02-18 10:08:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 745 transitions. [2019-02-18 10:08:33,812 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 745 transitions. Word has length 5 [2019-02-18 10:08:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:33,813 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 745 transitions. [2019-02-18 10:08:33,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:08:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 745 transitions. [2019-02-18 10:08:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:33,814 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:33,814 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:33,814 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:33,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:33,814 INFO L82 PathProgramCache]: Analyzing trace with hash 28829936, now seen corresponding path program 1 times [2019-02-18 10:08:33,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:33,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:33,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:33,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:33,815 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:08:33,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:33,937 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:33,937 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:33,937 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [29] [2019-02-18 10:08:33,938 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:33,938 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:34,163 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:34,163 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:08:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:34,164 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:34,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:34,164 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:34,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:34,172 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:34,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:34,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:34,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:34,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,216 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:34,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,227 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,230 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:34,237 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:34,254 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:08:34,254 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,286 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,311 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,330 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,345 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,359 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,389 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:08:34,422 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,423 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:08:34,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:08:34,518 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,518 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,521 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:34,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:08:34,523 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,539 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,556 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,573 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:34,608 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:34,609 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:08:35,056 WARN L181 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2019-02-18 10:08:35,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:08:35,061 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:35,094 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:35,094 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:08:35,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,118 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,120 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:35,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-02-18 10:08:35,122 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:35,155 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:35,156 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2019-02-18 10:08:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:35,174 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:35,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:35,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-02-18 10:08:35,214 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:35,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-02-18 10:08:35,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-02-18 10:08:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:08:35,215 INFO L87 Difference]: Start difference. First operand 125 states and 745 transitions. Second operand 7 states. [2019-02-18 10:08:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:35,512 INFO L93 Difference]: Finished difference Result 158 states and 796 transitions. [2019-02-18 10:08:35,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:08:35,512 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2019-02-18 10:08:35,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:35,514 INFO L225 Difference]: With dead ends: 158 [2019-02-18 10:08:35,514 INFO L226 Difference]: Without dead ends: 156 [2019-02-18 10:08:35,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-02-18 10:08:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-02-18 10:08:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 128. [2019-02-18 10:08:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-02-18 10:08:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 760 transitions. [2019-02-18 10:08:35,540 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 760 transitions. Word has length 5 [2019-02-18 10:08:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:35,540 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 760 transitions. [2019-02-18 10:08:35,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-02-18 10:08:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 760 transitions. [2019-02-18 10:08:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:35,541 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:35,541 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:35,542 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash 28831546, now seen corresponding path program 2 times [2019-02-18 10:08:35,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:35,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:35,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:35,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:35,543 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:35,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:35,649 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:35,649 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:08:35,649 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:08:35,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:35,650 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:35,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:08:35,660 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:08:35,667 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:08:35,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:08:35,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:35,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:08:35,760 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,760 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:08:35,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:08:35,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:08:35,940 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:35,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:08:35,948 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:35,978 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,007 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,036 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,066 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:36,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:36,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:36,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:36,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:36,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:08:36,117 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,157 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,179 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,197 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,211 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,224 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:36,274 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-02-18 10:08:36,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:08:36,308 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,357 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:36,358 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:08:36,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,385 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,387 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,388 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-02-18 10:08:36,391 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,446 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:36,446 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-02-18 10:08:36,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,478 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,483 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:36,485 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:36,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-02-18 10:08:36,486 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:36,542 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:36,542 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-02-18 10:08:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:36,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:36,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:36,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-02-18 10:08:36,606 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:36,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:08:36,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:08:36,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-02-18 10:08:36,607 INFO L87 Difference]: Start difference. First operand 128 states and 760 transitions. Second operand 10 states. [2019-02-18 10:08:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:08:37,314 INFO L93 Difference]: Finished difference Result 241 states and 1191 transitions. [2019-02-18 10:08:37,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:08:37,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:08:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:08:37,319 INFO L225 Difference]: With dead ends: 241 [2019-02-18 10:08:37,319 INFO L226 Difference]: Without dead ends: 235 [2019-02-18 10:08:37,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:08:37,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-02-18 10:08:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 164. [2019-02-18 10:08:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-02-18 10:08:37,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 1007 transitions. [2019-02-18 10:08:37,355 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 1007 transitions. Word has length 5 [2019-02-18 10:08:37,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:08:37,356 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 1007 transitions. [2019-02-18 10:08:37,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:08:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 1007 transitions. [2019-02-18 10:08:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:08:37,357 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:08:37,357 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:08:37,357 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:08:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:37,357 INFO L82 PathProgramCache]: Analyzing trace with hash 28831858, now seen corresponding path program 1 times [2019-02-18 10:08:37,357 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:08:37,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:37,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:08:37,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:08:37,358 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:08:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:08:37,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:37,714 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:08:37,714 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:08:37,714 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [29] [2019-02-18 10:08:37,715 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:08:37,715 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:08:38,013 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:08:38,013 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:08:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:08:38,013 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:08:38,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:08:38,013 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:08:38,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:08:38,022 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:08:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:08:38,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:08:38,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:08:38,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:08:38,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:08:38,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:08:38,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:08:38,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:08:38,125 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,157 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,181 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,221 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,236 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,250 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:08:38,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:08:38,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:08:38,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:08:38,411 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,446 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,461 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,478 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:08:38,513 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:08:38,514 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:08:38,743 WARN L181 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 10:08:38,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:38,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-02-18 10:08:38,819 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:08:38,968 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:08:38,968 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:106 [2019-02-18 10:08:39,184 WARN L181 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2019-02-18 10:08:39,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,191 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,194 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:08:39,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2019-02-18 10:08:39,195 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:08:39,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:08:39,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2019-02-18 10:08:39,325 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2019-02-18 10:08:39,696 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-02-18 10:08:39,696 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:126, output treesize:280 [2019-02-18 10:08:50,133 WARN L181 SmtUtils]: Spent 10.41 s on a formula simplification. DAG size of input: 171 DAG size of output: 90 [2019-02-18 10:08:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:50,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:08:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:08:50,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:08:50,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:08:50,187 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:08:50,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:08:50,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:08:50,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:08:50,188 INFO L87 Difference]: Start difference. First operand 164 states and 1007 transitions. Second operand 8 states. [2019-02-18 10:08:50,688 WARN L181 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-02-18 10:08:54,303 WARN L181 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2019-02-18 10:09:14,946 WARN L181 SmtUtils]: Spent 20.44 s on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-02-18 10:09:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:15,272 INFO L93 Difference]: Finished difference Result 208 states and 1150 transitions. [2019-02-18 10:09:15,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:09:15,273 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-02-18 10:09:15,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:15,276 INFO L225 Difference]: With dead ends: 208 [2019-02-18 10:09:15,276 INFO L226 Difference]: Without dead ends: 207 [2019-02-18 10:09:15,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:09:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-02-18 10:09:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2019-02-18 10:09:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-02-18 10:09:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 1128 transitions. [2019-02-18 10:09:15,317 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 1128 transitions. Word has length 5 [2019-02-18 10:09:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:15,318 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 1128 transitions. [2019-02-18 10:09:15,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:09:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 1128 transitions. [2019-02-18 10:09:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:15,319 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:15,319 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:15,319 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:15,319 INFO L82 PathProgramCache]: Analyzing trace with hash 28818278, now seen corresponding path program 1 times [2019-02-18 10:09:15,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:15,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:15,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:15,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:15,321 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:15,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:15,495 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:15,495 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:09:15,496 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [27] [2019-02-18 10:09:15,497 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:15,497 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:15,958 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:15,958 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:09:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:15,958 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:15,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:15,959 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:09:15,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:15,967 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:15,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:16,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:09:16,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:09:16,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:09:16,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:09:16,154 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,171 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,190 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,208 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:09:16,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:09:16,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:09:16,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:09:16,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:09:16,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:09:16,256 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,286 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,310 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,330 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,360 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,371 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:16,407 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:16,407 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:09:16,656 WARN L181 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 10:09:16,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:16,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-02-18 10:09:16,679 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:09:16,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-02-18 10:09:16,798 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2019-02-18 10:09:17,055 WARN L181 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-02-18 10:09:17,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 103 [2019-02-18 10:09:17,084 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:09:17,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,272 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 89 [2019-02-18 10:09:17,279 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:17,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-02-18 10:09:17,373 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:129, output treesize:125 [2019-02-18 10:09:17,597 WARN L181 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2019-02-18 10:09:17,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:17,645 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:17,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 118 [2019-02-18 10:09:17,674 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-02-18 10:09:18,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,012 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:18,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-02-18 10:09:18,015 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,180 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,181 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,187 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,191 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:18,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 110 [2019-02-18 10:09:18,196 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:18,368 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-02-18 10:09:18,369 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:242 [2019-02-18 10:09:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:18,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:18,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:18,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:09:18,553 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:18,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:09:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:09:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:09:18,554 INFO L87 Difference]: Start difference. First operand 181 states and 1128 transitions. Second operand 10 states. [2019-02-18 10:09:19,216 WARN L181 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2019-02-18 10:09:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:19,836 INFO L93 Difference]: Finished difference Result 280 states and 1534 transitions. [2019-02-18 10:09:19,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-02-18 10:09:19,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:09:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:19,840 INFO L225 Difference]: With dead ends: 280 [2019-02-18 10:09:19,840 INFO L226 Difference]: Without dead ends: 279 [2019-02-18 10:09:19,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:09:19,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-02-18 10:09:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 185. [2019-02-18 10:09:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-02-18 10:09:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 1156 transitions. [2019-02-18 10:09:19,887 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 1156 transitions. Word has length 5 [2019-02-18 10:09:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:19,887 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 1156 transitions. [2019-02-18 10:09:19,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:09:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 1156 transitions. [2019-02-18 10:09:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:19,889 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:19,889 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:19,889 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:19,889 INFO L82 PathProgramCache]: Analyzing trace with hash 28835766, now seen corresponding path program 1 times [2019-02-18 10:09:19,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:19,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:19,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:19,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:19,891 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:20,268 WARN L181 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2019-02-18 10:09:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:09:20,269 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 10:09:20,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-02-18 10:09:20,269 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 10:09:20,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-18 10:09:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-18 10:09:20,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-02-18 10:09:20,270 INFO L87 Difference]: Start difference. First operand 185 states and 1156 transitions. Second operand 4 states. [2019-02-18 10:09:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:20,454 INFO L93 Difference]: Finished difference Result 201 states and 1179 transitions. [2019-02-18 10:09:20,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-18 10:09:20,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-02-18 10:09:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:20,458 INFO L225 Difference]: With dead ends: 201 [2019-02-18 10:09:20,459 INFO L226 Difference]: Without dead ends: 198 [2019-02-18 10:09:20,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-02-18 10:09:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-02-18 10:09:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2019-02-18 10:09:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-02-18 10:09:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 1164 transitions. [2019-02-18 10:09:20,506 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 1164 transitions. Word has length 5 [2019-02-18 10:09:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:20,506 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 1164 transitions. [2019-02-18 10:09:20,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-18 10:09:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 1164 transitions. [2019-02-18 10:09:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:20,507 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:20,508 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:20,508 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash 28822248, now seen corresponding path program 1 times [2019-02-18 10:09:20,508 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:20,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:20,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:20,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:20,509 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:09:20,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:20,629 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:20,629 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:09:20,629 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [29] [2019-02-18 10:09:20,630 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:20,631 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:21,006 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:21,006 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:09:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:21,007 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:21,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:21,007 INFO 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 [2019-02-18 10:09:21,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:21,022 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:21,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:21,153 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-02-18 10:09:21,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:09:21,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:09:21,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,235 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,236 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:09:21,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:09:21,300 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,321 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,344 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,371 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:09:21,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:09:21,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:09:21,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:09:21,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:09:21,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:09:21,420 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,448 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,470 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,488 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,502 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,515 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,567 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:21,568 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:09:21,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:09:21,607 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,639 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:21,640 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:09:21,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,663 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:21,668 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:21,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-02-18 10:09:21,669 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:21,703 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:21,704 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2019-02-18 10:09:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:21,724 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:21,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:21,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:09:21,764 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:21,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:09:21,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:09:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:09:21,765 INFO L87 Difference]: Start difference. First operand 187 states and 1164 transitions. Second operand 8 states. [2019-02-18 10:09:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:22,112 INFO L93 Difference]: Finished difference Result 208 states and 1202 transitions. [2019-02-18 10:09:22,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:09:22,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-02-18 10:09:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:22,116 INFO L225 Difference]: With dead ends: 208 [2019-02-18 10:09:22,116 INFO L226 Difference]: Without dead ends: 207 [2019-02-18 10:09:22,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:09:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-02-18 10:09:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2019-02-18 10:09:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-02-18 10:09:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 1178 transitions. [2019-02-18 10:09:22,147 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 1178 transitions. Word has length 5 [2019-02-18 10:09:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:22,147 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 1178 transitions. [2019-02-18 10:09:22,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:09:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 1178 transitions. [2019-02-18 10:09:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:22,148 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:22,148 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:22,148 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 29302748, now seen corresponding path program 1 times [2019-02-18 10:09:22,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:22,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:22,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:22,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:22,150 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:22,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:22,224 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:22,224 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:09:22,224 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [29] [2019-02-18 10:09:22,225 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:22,225 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:22,476 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:22,477 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:09:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:22,477 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:22,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:22,477 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-18 10:09:22,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:22,487 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:22,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:22,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:09:22,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:09:22,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:09:22,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:22,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:09:22,649 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,743 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,766 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,790 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:09:22,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:09:22,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:09:22,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:09:22,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:09:22,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:09:22,849 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,877 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,898 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,914 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,927 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,940 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:22,973 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:22,973 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-02-18 10:09:23,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-02-18 10:09:23,014 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:23,044 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:23,044 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-02-18 10:09:23,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-02-18 10:09:23,075 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:23,107 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:23,107 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:34 [2019-02-18 10:09:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:23,126 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:23,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:23,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:09:23,174 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:23,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:09:23,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:09:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:09:23,175 INFO L87 Difference]: Start difference. First operand 189 states and 1178 transitions. Second operand 8 states. [2019-02-18 10:09:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:23,500 INFO L93 Difference]: Finished difference Result 210 states and 1196 transitions. [2019-02-18 10:09:23,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:09:23,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-02-18 10:09:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:23,503 INFO L225 Difference]: With dead ends: 210 [2019-02-18 10:09:23,503 INFO L226 Difference]: Without dead ends: 208 [2019-02-18 10:09:23,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:09:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-02-18 10:09:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2019-02-18 10:09:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-02-18 10:09:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 1179 transitions. [2019-02-18 10:09:23,547 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 1179 transitions. Word has length 5 [2019-02-18 10:09:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:23,548 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 1179 transitions. [2019-02-18 10:09:23,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:09:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 1179 transitions. [2019-02-18 10:09:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:23,548 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:23,548 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:23,549 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash 29308202, now seen corresponding path program 2 times [2019-02-18 10:09:23,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:23,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:23,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:23,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:23,550 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:23,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:23,681 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:23,681 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:09:23,681 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:09:23,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:23,682 INFO 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 [2019-02-18 10:09:23,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:09:23,693 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:09:23,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:09:23,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:09:23,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:23,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:09:23,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:09:23,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:09:23,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,894 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:09:23,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:23,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:09:23,980 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,015 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,051 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,083 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,120 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:09:24,167 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:09:24,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:09:24,173 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:09:24,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:09:24,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:09:24,184 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,447 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,470 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,488 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,503 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,516 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,567 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:24,567 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:09:24,608 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:09:24,609 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,660 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:24,660 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:09:24,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,691 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-02-18 10:09:24,700 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,754 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:24,755 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-02-18 10:09:24,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,787 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,789 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,791 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,792 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,795 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:24,799 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:24,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 124 [2019-02-18 10:09:24,801 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:24,858 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:24,859 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-02-18 10:09:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:24,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:24,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:24,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:09:24,955 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:24,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:09:24,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:09:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:09:24,956 INFO L87 Difference]: Start difference. First operand 191 states and 1179 transitions. Second operand 10 states. [2019-02-18 10:09:28,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:28,892 INFO L93 Difference]: Finished difference Result 242 states and 1308 transitions. [2019-02-18 10:09:28,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:09:28,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:09:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:28,896 INFO L225 Difference]: With dead ends: 242 [2019-02-18 10:09:28,896 INFO L226 Difference]: Without dead ends: 240 [2019-02-18 10:09:28,897 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:09:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-02-18 10:09:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2019-02-18 10:09:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-02-18 10:09:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 1251 transitions. [2019-02-18 10:09:28,945 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 1251 transitions. Word has length 5 [2019-02-18 10:09:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:28,945 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 1251 transitions. [2019-02-18 10:09:28,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:09:28,946 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 1251 transitions. [2019-02-18 10:09:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:28,947 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:28,947 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:28,947 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:28,947 INFO L82 PathProgramCache]: Analyzing trace with hash 29307954, now seen corresponding path program 1 times [2019-02-18 10:09:28,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:28,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:28,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:09:28,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:28,948 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:29,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:29,023 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:29,023 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:09:29,023 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [27] [2019-02-18 10:09:29,024 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:29,025 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:29,353 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:29,353 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:09:29,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:29,354 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:29,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:29,354 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-18 10:09:29,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:29,362 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:29,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:29,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:09:29,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:09:29,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,421 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:09:29,428 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,430 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,431 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:09:29,438 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,440 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,444 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:09:29,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:09:29,458 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,504 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,529 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,549 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,565 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,579 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:09:29,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:09:29,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:09:29,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,765 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:09:29,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:29,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:09:29,848 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,876 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,904 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,931 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:29,960 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:30,011 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:30,012 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:09:30,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:09:30,062 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:30,124 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:30,124 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:09:30,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-02-18 10:09:30,180 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:30,241 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:30,241 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-02-18 10:09:30,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,302 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:30,311 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:30,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2019-02-18 10:09:30,313 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:30,375 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:30,375 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-02-18 10:09:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:30,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:30,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:30,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:09:30,462 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:30,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:09:30,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:09:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:09:30,463 INFO L87 Difference]: Start difference. First operand 202 states and 1251 transitions. Second operand 10 states. [2019-02-18 10:09:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:31,153 INFO L93 Difference]: Finished difference Result 249 states and 1369 transitions. [2019-02-18 10:09:31,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:09:31,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:09:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:31,157 INFO L225 Difference]: With dead ends: 249 [2019-02-18 10:09:31,157 INFO L226 Difference]: Without dead ends: 247 [2019-02-18 10:09:31,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:09:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-02-18 10:09:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 212. [2019-02-18 10:09:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-02-18 10:09:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 1326 transitions. [2019-02-18 10:09:31,190 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 1326 transitions. Word has length 5 [2019-02-18 10:09:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:31,190 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 1326 transitions. [2019-02-18 10:09:31,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:09:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 1326 transitions. [2019-02-18 10:09:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:31,191 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:31,191 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:31,192 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash 29294624, now seen corresponding path program 1 times [2019-02-18 10:09:31,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:31,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:31,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:31,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:31,193 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:31,384 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2019-02-18 10:09:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:31,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:31,420 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:31,420 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:09:31,420 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [27] [2019-02-18 10:09:31,423 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:31,423 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:31,730 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:31,731 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:09:31,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:31,731 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:31,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:31,731 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:09:31,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:31,740 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:31,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:31,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:09:31,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:09:31,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,790 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:09:31,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,801 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:09:31,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,817 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:09:31,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:09:31,830 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:31,860 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:31,885 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:31,905 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:31,921 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:31,935 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:31,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:31,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:09:32,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:09:32,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:09:32,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:09:32,101 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:32,163 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:32,181 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:32,199 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:32,235 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:32,235 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:09:32,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:09:32,298 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:32,329 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:32,329 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-02-18 10:09:32,356 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,361 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,363 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-02-18 10:09:32,364 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:32,399 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:32,400 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2019-02-18 10:09:32,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,427 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,428 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,429 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,430 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,431 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,435 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,436 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,437 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:32,438 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:32,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-02-18 10:09:32,439 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:32,490 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:32,490 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-02-18 10:09:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:32,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:32,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:32,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:09:32,570 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:32,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:09:32,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:09:32,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:09:32,571 INFO L87 Difference]: Start difference. First operand 212 states and 1326 transitions. Second operand 10 states. [2019-02-18 10:09:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:33,174 INFO L93 Difference]: Finished difference Result 260 states and 1437 transitions. [2019-02-18 10:09:33,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:09:33,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:09:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:33,178 INFO L225 Difference]: With dead ends: 260 [2019-02-18 10:09:33,178 INFO L226 Difference]: Without dead ends: 258 [2019-02-18 10:09:33,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-02-18 10:09:33,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-02-18 10:09:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2019-02-18 10:09:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-02-18 10:09:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2019-02-18 10:09:33,215 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2019-02-18 10:09:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:33,215 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2019-02-18 10:09:33,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:09:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2019-02-18 10:09:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:33,216 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:33,216 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:33,216 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:33,216 INFO L82 PathProgramCache]: Analyzing trace with hash 29298904, now seen corresponding path program 1 times [2019-02-18 10:09:33,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:33,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:33,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:33,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:33,217 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:33,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:33,410 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:33,411 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:09:33,411 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [28], [29] [2019-02-18 10:09:33,412 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:33,412 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:33,639 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:33,639 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:09:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:33,639 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:33,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:33,639 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:09:33,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:33,648 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:33,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:33,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:09:33,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:09:33,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:09:33,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,691 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:09:33,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:09:33,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:09:33,721 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:33,772 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:33,796 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:33,815 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:33,830 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:33,845 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:33,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:09:33,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:09:33,939 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,939 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:09:33,992 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,993 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,996 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,997 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:33,999 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:09:34,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:09:34,075 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:34,102 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:34,127 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:34,152 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:34,182 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:34,230 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:34,230 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-02-18 10:09:34,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-02-18 10:09:34,260 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:34,305 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:34,306 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-02-18 10:09:34,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,330 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,330 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,332 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,336 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:34,336 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:34,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 101 [2019-02-18 10:09:34,338 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:34,388 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:34,388 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:55 [2019-02-18 10:09:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:34,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:34,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:34,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:09:34,452 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:34,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:09:34,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:09:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:09:34,453 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2019-02-18 10:09:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:34,789 INFO L93 Difference]: Finished difference Result 244 states and 1417 transitions. [2019-02-18 10:09:34,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:09:34,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-02-18 10:09:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:34,793 INFO L225 Difference]: With dead ends: 244 [2019-02-18 10:09:34,793 INFO L226 Difference]: Without dead ends: 243 [2019-02-18 10:09:34,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:09:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-02-18 10:09:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2019-02-18 10:09:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-02-18 10:09:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2019-02-18 10:09:34,840 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2019-02-18 10:09:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:34,840 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2019-02-18 10:09:34,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:09:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2019-02-18 10:09:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:34,841 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:34,841 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:34,842 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:34,842 INFO L82 PathProgramCache]: Analyzing trace with hash 29366174, now seen corresponding path program 1 times [2019-02-18 10:09:34,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:34,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:34,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:34,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:34,843 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:35,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:35,058 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:35,058 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:09:35,059 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [28], [29] [2019-02-18 10:09:35,059 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:09:35,060 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:09:35,340 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:09:35,340 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:09:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:35,340 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:09:35,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:35,341 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:09:35,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:35,352 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:09:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:35,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:35,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:09:35,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:09:35,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:35,485 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:35,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:09:35,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:35,575 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:35,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:35,593 INFO L303 Elim1Store]: Index analysis took 104 ms [2019-02-18 10:09:35,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:09:35,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:35,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:35,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:35,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:35,699 INFO L303 Elim1Store]: Index analysis took 104 ms [2019-02-18 10:09:35,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:09:35,836 INFO L303 Elim1Store]: Index analysis took 134 ms [2019-02-18 10:09:35,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:09:35,838 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,199 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,219 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,237 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,252 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,266 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:09:36,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:09:36,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:09:36,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:09:36,408 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,424 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,440 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,458 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:36,491 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:09:36,492 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-02-18 10:09:36,686 WARN L181 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-02-18 10:09:36,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:36,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2019-02-18 10:09:36,751 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-02-18 10:09:37,119 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2019-02-18 10:09:37,120 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:425 [2019-02-18 10:09:37,288 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 90 [2019-02-18 10:09:37,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,298 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:09:37,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 88 [2019-02-18 10:09:37,300 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:37,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,421 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 92 [2019-02-18 10:09:37,422 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:37,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,521 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,523 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,525 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:37,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 71 [2019-02-18 10:09:37,528 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:37,609 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-02-18 10:09:37,610 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:194, output treesize:126 [2019-02-18 10:09:37,802 WARN L181 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-02-18 10:09:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:37,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:09:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:37,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:09:37,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:09:37,869 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:09:37,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:09:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:09:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:09:37,870 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2019-02-18 10:09:38,299 WARN L181 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-02-18 10:09:38,691 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-02-18 10:09:59,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:09:59,440 INFO L93 Difference]: Finished difference Result 273 states and 1446 transitions. [2019-02-18 10:09:59,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-18 10:09:59,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-02-18 10:09:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:09:59,443 INFO L225 Difference]: With dead ends: 273 [2019-02-18 10:09:59,443 INFO L226 Difference]: Without dead ends: 272 [2019-02-18 10:09:59,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:09:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-02-18 10:09:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 222. [2019-02-18 10:09:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-02-18 10:09:59,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 1396 transitions. [2019-02-18 10:09:59,480 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 1396 transitions. Word has length 5 [2019-02-18 10:09:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:09:59,480 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 1396 transitions. [2019-02-18 10:09:59,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:09:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 1396 transitions. [2019-02-18 10:09:59,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:09:59,481 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:09:59,481 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:09:59,481 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:09:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:09:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash 29353958, now seen corresponding path program 2 times [2019-02-18 10:09:59,481 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:09:59,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:59,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:09:59,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:09:59,482 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:09:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:09:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:09:59,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:59,594 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:09:59,594 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:09:59,595 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:09:59,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:09:59,595 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:09:59,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:09:59,605 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:09:59,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:09:59,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:09:59,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:09:59,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:09:59,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:09:59,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,657 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:09:59,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:09:59,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:09:59,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,681 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:09:59,686 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:09:59,732 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:59,758 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:59,779 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:59,796 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:59,811 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:09:59,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:09:59,893 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,894 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:09:59,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:09:59,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:10:00,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:10:00,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,089 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:10:00,092 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,120 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,146 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,176 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,204 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,255 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:00,255 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-02-18 10:10:00,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:10:00,287 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,339 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:00,340 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-02-18 10:10:00,366 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,371 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,375 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:00,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-02-18 10:10:00,376 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,431 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:00,431 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-02-18 10:10:00,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:00,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-02-18 10:10:00,475 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:00,529 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:00,529 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-02-18 10:10:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:00,551 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:00,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:00,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:10:00,597 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:00,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:00,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:00,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:10:00,598 INFO L87 Difference]: Start difference. First operand 222 states and 1396 transitions. Second operand 10 states. [2019-02-18 10:10:01,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:01,512 INFO L93 Difference]: Finished difference Result 274 states and 1519 transitions. [2019-02-18 10:10:01,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:10:01,512 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:10:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:01,516 INFO L225 Difference]: With dead ends: 274 [2019-02-18 10:10:01,516 INFO L226 Difference]: Without dead ends: 273 [2019-02-18 10:10:01,517 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:10:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-02-18 10:10:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 225. [2019-02-18 10:10:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-02-18 10:10:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2019-02-18 10:10:01,559 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2019-02-18 10:10:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:01,560 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2019-02-18 10:10:01,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2019-02-18 10:10:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:10:01,561 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:01,561 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:10:01,561 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:01,562 INFO L82 PathProgramCache]: Analyzing trace with hash 29372004, now seen corresponding path program 1 times [2019-02-18 10:10:01,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:01,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:01,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:10:01,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:01,563 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:01,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:01,669 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:01,669 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:10:01,670 INFO L207 CegarAbsIntRunner]: [0], [24], [28], [30], [31] [2019-02-18 10:10:01,671 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:01,671 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:03,041 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:03,042 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:10:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:03,042 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:03,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:03,042 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:03,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:03,050 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:03,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:03,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:10:03,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:10:03,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:10:03,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,207 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,212 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:10:03,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:10:03,288 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,314 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,342 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,370 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,400 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:03,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:10:03,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:10:03,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:10:03,454 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:10:03,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:10:03,459 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,497 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,518 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,533 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,546 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,558 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,605 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:03,606 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2019-02-18 10:10:03,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:03,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-02-18 10:10:03,631 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:03,680 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:03,680 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:97, output treesize:67 [2019-02-18 10:10:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:03,702 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:03,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:03,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 10:10:03,735 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:03,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 10:10:03,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 10:10:03,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 10:10:03,736 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 6 states. [2019-02-18 10:10:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:04,001 INFO L93 Difference]: Finished difference Result 242 states and 1433 transitions. [2019-02-18 10:10:04,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 10:10:04,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-02-18 10:10:04,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:04,005 INFO L225 Difference]: With dead ends: 242 [2019-02-18 10:10:04,005 INFO L226 Difference]: Without dead ends: 241 [2019-02-18 10:10:04,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 10:10:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-02-18 10:10:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2019-02-18 10:10:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-02-18 10:10:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2019-02-18 10:10:04,040 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2019-02-18 10:10:04,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:04,041 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2019-02-18 10:10:04,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 10:10:04,041 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2019-02-18 10:10:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:10:04,041 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:04,041 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:10:04,042 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash 29357926, now seen corresponding path program 1 times [2019-02-18 10:10:04,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:04,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:04,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:04,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:04,043 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:04,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:04,178 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:04,178 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:10:04,179 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [24], [27] [2019-02-18 10:10:04,179 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:04,180 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:04,856 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:04,857 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:04,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:04,857 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:04,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:04,857 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:04,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:04,866 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:04,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:04,907 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:04,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:10:04,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:04,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:04,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:10:05,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:10:05,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:10:05,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:10:05,152 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,183 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,209 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,240 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,270 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:05,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:05,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:05,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:05,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:05,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:10:05,326 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,377 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,400 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,419 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,433 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,447 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,498 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:05,499 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:10:05,537 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:10:05,539 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,589 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:05,589 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:10:05,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,620 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:10:05,630 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,684 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:05,685 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-02-18 10:10:05,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,722 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,724 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,725 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:05,728 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:05,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 128 [2019-02-18 10:10:05,729 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:05,796 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:05,797 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-02-18 10:10:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:05,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:05,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:05,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:10:05,949 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:05,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:05,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:05,950 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 10 states. [2019-02-18 10:10:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:06,702 INFO L93 Difference]: Finished difference Result 276 states and 1527 transitions. [2019-02-18 10:10:06,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:06,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 10:10:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:06,709 INFO L225 Difference]: With dead ends: 276 [2019-02-18 10:10:06,709 INFO L226 Difference]: Without dead ends: 274 [2019-02-18 10:10:06,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:10:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-02-18 10:10:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 234. [2019-02-18 10:10:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-02-18 10:10:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 1480 transitions. [2019-02-18 10:10:06,757 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 1480 transitions. Word has length 5 [2019-02-18 10:10:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:06,757 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 1480 transitions. [2019-02-18 10:10:06,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 1480 transitions. [2019-02-18 10:10:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:10:06,758 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:06,758 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:10:06,758 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:06,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:06,759 INFO L82 PathProgramCache]: Analyzing trace with hash 28933724, now seen corresponding path program 1 times [2019-02-18 10:10:06,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:06,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:06,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:06,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:06,760 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:06,948 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2019-02-18 10:10:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:06,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:06,959 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:06,959 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:10:06,960 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [29] [2019-02-18 10:10:06,960 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:06,960 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:07,199 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:07,199 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:10:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:07,199 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:07,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:07,199 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:07,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:07,208 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:07,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:07,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:10:07,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:10:07,325 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,327 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:10:07,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:10:07,385 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,405 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,423 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,441 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:07,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:07,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:07,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:07,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:07,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:10:07,490 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,519 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,542 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,559 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,574 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,587 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,631 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:07,632 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-02-18 10:10:07,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:10:07,719 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:07,812 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:10:07,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:07,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:10:07,843 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:07,879 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:07,879 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-02-18 10:10:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:07,897 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:07,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:07,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:10:07,939 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:07,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:07,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:07,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:07,939 INFO L87 Difference]: Start difference. First operand 234 states and 1480 transitions. Second operand 8 states. [2019-02-18 10:10:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:08,377 INFO L93 Difference]: Finished difference Result 288 states and 1635 transitions. [2019-02-18 10:10:08,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:08,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-02-18 10:10:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:08,381 INFO L225 Difference]: With dead ends: 288 [2019-02-18 10:10:08,381 INFO L226 Difference]: Without dead ends: 287 [2019-02-18 10:10:08,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-02-18 10:10:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-02-18 10:10:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 250. [2019-02-18 10:10:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-02-18 10:10:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 1595 transitions. [2019-02-18 10:10:08,439 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 1595 transitions. Word has length 5 [2019-02-18 10:10:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:08,440 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 1595 transitions. [2019-02-18 10:10:08,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 1595 transitions. [2019-02-18 10:10:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 10:10:08,440 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:08,440 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 10:10:08,441 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:08,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash 28941412, now seen corresponding path program 1 times [2019-02-18 10:10:08,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:08,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:08,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:08,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:08,442 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:08,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:08,623 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:08,623 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 10:10:08,624 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [28], [29] [2019-02-18 10:10:08,625 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:08,625 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:08,839 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:08,839 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:10:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:08,840 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:08,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:08,840 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:08,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:08,849 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:08,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:08,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:08,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:10:08,880 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,882 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:10:08,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,893 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:10:08,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,924 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,926 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:08,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:10:08,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:10:08,938 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:08,967 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:08,990 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,007 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,021 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,036 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:10:09,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:10:09,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,118 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:10:09,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,166 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:10:09,170 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,187 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,203 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,221 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,255 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:09,255 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-02-18 10:10:09,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:10:09,302 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:10:09,404 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:10:09,404 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:92 [2019-02-18 10:10:09,441 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,443 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,443 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,444 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:09,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-02-18 10:10:09,446 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:09,469 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:09,469 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:27 [2019-02-18 10:10:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:09,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:09,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:09,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:10:09,519 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:09,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:10:09,520 INFO L87 Difference]: Start difference. First operand 250 states and 1595 transitions. Second operand 8 states. [2019-02-18 10:10:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:09,957 INFO L93 Difference]: Finished difference Result 319 states and 1823 transitions. [2019-02-18 10:10:09,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:10:09,958 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-02-18 10:10:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:09,962 INFO L225 Difference]: With dead ends: 319 [2019-02-18 10:10:09,962 INFO L226 Difference]: Without dead ends: 318 [2019-02-18 10:10:09,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-02-18 10:10:10,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2019-02-18 10:10:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-02-18 10:10:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2019-02-18 10:10:10,025 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 5 [2019-02-18 10:10:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:10,025 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2019-02-18 10:10:10,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2019-02-18 10:10:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:10,026 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:10,027 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-02-18 10:10:10,027 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:10,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:10,027 INFO L82 PathProgramCache]: Analyzing trace with hash 904691166, now seen corresponding path program 1 times [2019-02-18 10:10:10,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:10,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:10,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:10,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:10,028 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:10,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:10,076 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:10,076 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:10,076 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [30], [31] [2019-02-18 10:10:10,077 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:10,077 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:10,237 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:10,238 INFO L272 AbstractInterpreter]: Visited 5 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:10:10,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:10,238 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:10,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:10,238 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:10,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:10,248 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:10,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:10,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:10:10,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:10:10,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,333 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,338 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,340 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:10:10,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,387 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,389 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:10:10,394 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,414 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,436 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,460 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:10,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:10:10,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:10:10,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:10:10,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:10:10,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:10:10,518 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,544 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,564 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,580 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,593 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,606 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,639 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:10,639 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-02-18 10:10:10,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-02-18 10:10:10,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,722 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:10,723 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-02-18 10:10:10,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:10,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 74 [2019-02-18 10:10:10,748 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:10,782 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:10,782 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:46 [2019-02-18 10:10:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:10,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:10,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:10,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-02-18 10:10:10,836 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:10,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-02-18 10:10:10,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-02-18 10:10:10,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:10:10,837 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 7 states. [2019-02-18 10:10:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:11,070 INFO L93 Difference]: Finished difference Result 290 states and 1801 transitions. [2019-02-18 10:10:11,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:10:11,071 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2019-02-18 10:10:11,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:11,075 INFO L225 Difference]: With dead ends: 290 [2019-02-18 10:10:11,075 INFO L226 Difference]: Without dead ends: 289 [2019-02-18 10:10:11,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-02-18 10:10:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 276. [2019-02-18 10:10:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-02-18 10:10:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2019-02-18 10:10:11,129 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 6 [2019-02-18 10:10:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:11,129 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2019-02-18 10:10:11,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-02-18 10:10:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2019-02-18 10:10:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:11,131 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:11,131 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-02-18 10:10:11,131 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:11,131 INFO L82 PathProgramCache]: Analyzing trace with hash 904323688, now seen corresponding path program 3 times [2019-02-18 10:10:11,131 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:11,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:11,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:11,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:11,132 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:11,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:11,343 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:11,344 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:10:11,344 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:10:11,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:11,344 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:11,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-18 10:10:11,353 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-18 10:10:11,358 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-18 10:10:11,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:10:11,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:11,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:11,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:11,385 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:11,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:11,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:11,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:10:11,414 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,447 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,472 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,489 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,505 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,519 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:10:11,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,586 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:10:11,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:10:11,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:10:11,681 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,699 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,717 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,735 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,771 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:11,771 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-02-18 10:10:11,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:10:11,806 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,841 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:11,841 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:10:11,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:10:11,867 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,903 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:11,903 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-02-18 10:10:11,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,924 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,927 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,930 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,931 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,932 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,934 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,937 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:11,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-02-18 10:10:11,938 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:11,981 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:11,982 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:38 [2019-02-18 10:10:12,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,015 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,017 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:12,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-02-18 10:10:12,020 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:12,061 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:12,062 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:38 [2019-02-18 10:10:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:12,079 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:12,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:12,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2019-02-18 10:10:12,136 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:12,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-02-18 10:10:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-02-18 10:10:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:10:12,137 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 11 states. [2019-02-18 10:10:12,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:12,742 INFO L93 Difference]: Finished difference Result 423 states and 2543 transitions. [2019-02-18 10:10:12,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-02-18 10:10:12,743 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-02-18 10:10:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:12,748 INFO L225 Difference]: With dead ends: 423 [2019-02-18 10:10:12,748 INFO L226 Difference]: Without dead ends: 421 [2019-02-18 10:10:12,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:10:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-02-18 10:10:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 325. [2019-02-18 10:10:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2019-02-18 10:10:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 2130 transitions. [2019-02-18 10:10:12,821 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 2130 transitions. Word has length 6 [2019-02-18 10:10:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:12,821 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 2130 transitions. [2019-02-18 10:10:12,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-02-18 10:10:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 2130 transitions. [2019-02-18 10:10:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:12,823 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:12,823 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:12,823 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:12,823 INFO L82 PathProgramCache]: Analyzing trace with hash 904327844, now seen corresponding path program 1 times [2019-02-18 10:10:12,823 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:12,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:12,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:10:12,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:12,824 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:12,969 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-02-18 10:10:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:13,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:13,385 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:13,385 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:13,385 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [28], [29] [2019-02-18 10:10:13,386 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:13,386 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:13,702 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:13,702 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:13,702 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:13,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:13,702 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:13,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:13,712 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:13,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:13,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:13,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:13,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,753 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:13,759 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,761 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:13,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:13,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,790 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:10:13,791 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,837 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,861 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,881 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,934 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,949 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:13,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:13,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:10:14,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:10:14,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:10:14,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:10:14,207 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,211 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,212 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:10:14,216 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:14,245 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:14,273 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:14,302 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:14,331 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:14,381 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:14,382 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:10:14,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:10:14,420 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:14,465 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:14,465 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:10:14,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:10:14,504 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:14,559 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:14,560 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-02-18 10:10:14,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:14,605 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:14,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-02-18 10:10:14,606 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:14,662 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:14,662 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-02-18 10:10:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:14,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:14,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:14,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:10:14,801 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:14,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:14,802 INFO L87 Difference]: Start difference. First operand 325 states and 2130 transitions. Second operand 10 states. [2019-02-18 10:10:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:15,873 INFO L93 Difference]: Finished difference Result 368 states and 2210 transitions. [2019-02-18 10:10:15,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:15,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:10:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:15,879 INFO L225 Difference]: With dead ends: 368 [2019-02-18 10:10:15,879 INFO L226 Difference]: Without dead ends: 366 [2019-02-18 10:10:15,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:10:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2019-02-18 10:10:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 329. [2019-02-18 10:10:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2019-02-18 10:10:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 2135 transitions. [2019-02-18 10:10:15,949 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 2135 transitions. Word has length 6 [2019-02-18 10:10:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:15,949 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 2135 transitions. [2019-02-18 10:10:15,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 2135 transitions. [2019-02-18 10:10:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:15,951 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:15,951 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-02-18 10:10:15,951 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash 904329640, now seen corresponding path program 3 times [2019-02-18 10:10:15,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:15,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:15,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:15,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:15,952 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:16,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:16,010 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:16,010 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:10:16,010 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:10:16,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:16,011 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:16,022 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-18 10:10:16,022 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-18 10:10:16,028 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-18 10:10:16,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:10:16,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:16,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:16,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:16,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:16,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:16,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:16,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:10:16,157 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,202 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,230 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,252 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,273 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,290 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:10:16,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:10:16,438 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,440 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,445 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:10:16,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,504 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,505 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,509 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:10:16,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,580 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,586 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:10:16,589 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,617 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,645 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,674 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,703 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,753 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:16,753 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-02-18 10:10:16,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:10:16,785 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,833 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:16,833 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-02-18 10:10:16,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:10:16,872 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:16,926 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:16,926 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-02-18 10:10:16,949 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,961 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:16,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:16,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-02-18 10:10:16,964 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:17,019 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:17,020 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-02-18 10:10:17,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:17,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 135 [2019-02-18 10:10:17,068 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:17,130 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:17,130 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:45 [2019-02-18 10:10:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:17,154 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:17,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:17,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-02-18 10:10:17,221 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:17,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-02-18 10:10:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-02-18 10:10:17,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:10:17,222 INFO L87 Difference]: Start difference. First operand 329 states and 2135 transitions. Second operand 11 states. [2019-02-18 10:10:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:18,135 INFO L93 Difference]: Finished difference Result 407 states and 2353 transitions. [2019-02-18 10:10:18,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-18 10:10:18,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-02-18 10:10:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:18,140 INFO L225 Difference]: With dead ends: 407 [2019-02-18 10:10:18,140 INFO L226 Difference]: Without dead ends: 401 [2019-02-18 10:10:18,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-02-18 10:10:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2019-02-18 10:10:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 341. [2019-02-18 10:10:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-02-18 10:10:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 2222 transitions. [2019-02-18 10:10:18,218 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 2222 transitions. Word has length 6 [2019-02-18 10:10:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:18,218 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 2222 transitions. [2019-02-18 10:10:18,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-02-18 10:10:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 2222 transitions. [2019-02-18 10:10:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:18,219 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:18,219 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:18,219 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash 904329206, now seen corresponding path program 1 times [2019-02-18 10:10:18,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:18,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:18,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:10:18,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:18,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:18,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:18,358 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:18,359 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:18,359 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [24], [27] [2019-02-18 10:10:18,361 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:18,361 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:18,729 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:18,729 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:10:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:18,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:18,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:18,730 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:18,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:18,739 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:18,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:18,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:18,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:18,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:18,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:18,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:18,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:18,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:10:18,863 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,908 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,933 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,953 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,969 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:18,984 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,021 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:10:19,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:10:19,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:10:19,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:10:19,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,251 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:10:19,254 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,283 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,311 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,339 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,366 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,416 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:19,417 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:10:19,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:10:19,458 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,504 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:19,505 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:10:19,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,539 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,540 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,541 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,542 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,545 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:10:19,547 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,601 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:19,602 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-02-18 10:10:19,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,645 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:19,646 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-02-18 10:10:19,649 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,706 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:19,706 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-02-18 10:10:19,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,746 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:19,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:19,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-02-18 10:10:19,748 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:19,819 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:19,819 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-02-18 10:10:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:19,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:19,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:19,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-02-18 10:10:19,916 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:19,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:10:19,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:10:19,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:10:19,916 INFO L87 Difference]: Start difference. First operand 341 states and 2222 transitions. Second operand 12 states. [2019-02-18 10:10:21,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:21,044 INFO L93 Difference]: Finished difference Result 645 states and 3901 transitions. [2019-02-18 10:10:21,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-02-18 10:10:21,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:10:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:21,052 INFO L225 Difference]: With dead ends: 645 [2019-02-18 10:10:21,052 INFO L226 Difference]: Without dead ends: 643 [2019-02-18 10:10:21,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-02-18 10:10:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2019-02-18 10:10:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 463. [2019-02-18 10:10:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-02-18 10:10:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 3101 transitions. [2019-02-18 10:10:21,154 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 3101 transitions. Word has length 6 [2019-02-18 10:10:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:21,155 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 3101 transitions. [2019-02-18 10:10:21,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:10:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 3101 transitions. [2019-02-18 10:10:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:21,156 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:21,156 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:21,156 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash 904333674, now seen corresponding path program 1 times [2019-02-18 10:10:21,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:21,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:21,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:21,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:21,158 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:21,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:21,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:21,255 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:21,256 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [30], [31] [2019-02-18 10:10:21,256 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:21,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:21,469 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:21,469 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:10:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:21,469 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:21,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:21,470 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:21,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:21,477 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:21,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:21,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:21,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:10:21,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,505 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:10:21,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:10:21,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,527 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,530 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,533 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:10:21,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:10:21,549 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,587 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,610 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,628 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,642 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,657 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:10:21,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:10:21,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:10:21,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,782 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,785 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:10:21,786 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,803 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,819 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,836 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,869 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:21,870 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-02-18 10:10:21,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:21,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-02-18 10:10:21,916 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:21,944 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:21,944 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-02-18 10:10:22,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:22,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:22,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:22,021 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:22,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:22,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:22,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:22,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:10:22,037 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:10:22,142 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:10:22,142 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:68 [2019-02-18 10:10:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:22,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:22,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:22,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-02-18 10:10:22,226 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:22,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-02-18 10:10:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-02-18 10:10:22,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:22,226 INFO L87 Difference]: Start difference. First operand 463 states and 3101 transitions. Second operand 9 states. [2019-02-18 10:10:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:22,822 INFO L93 Difference]: Finished difference Result 527 states and 3325 transitions. [2019-02-18 10:10:22,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:10:22,823 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-02-18 10:10:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:22,828 INFO L225 Difference]: With dead ends: 527 [2019-02-18 10:10:22,828 INFO L226 Difference]: Without dead ends: 524 [2019-02-18 10:10:22,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:10:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2019-02-18 10:10:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 487. [2019-02-18 10:10:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2019-02-18 10:10:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 3268 transitions. [2019-02-18 10:10:22,942 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 3268 transitions. Word has length 6 [2019-02-18 10:10:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:22,942 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 3268 transitions. [2019-02-18 10:10:22,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-02-18 10:10:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 3268 transitions. [2019-02-18 10:10:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:22,943 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:22,943 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:22,943 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash 904320156, now seen corresponding path program 1 times [2019-02-18 10:10:22,944 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:22,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:22,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:22,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:22,944 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:23,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:23,014 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:23,014 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:23,014 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [28], [29] [2019-02-18 10:10:23,019 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:23,019 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:23,297 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:23,297 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:23,297 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:23,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:23,297 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:23,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:23,305 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:23,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:23,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:23,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:23,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:23,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,356 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:23,365 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,371 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:23,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:10:23,388 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,420 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,445 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,465 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,481 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,495 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,528 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:10:23,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:10:23,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,608 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:10:23,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:10:23,660 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,678 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,695 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,712 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,748 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:23,748 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:10:23,800 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:10:23,801 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:23,832 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-02-18 10:10:23,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:10:23,864 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,901 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:23,901 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-02-18 10:10:23,927 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,930 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,931 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,933 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,934 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,937 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,938 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,939 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:23,940 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:23,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 104 [2019-02-18 10:10:23,941 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:23,982 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:23,982 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-02-18 10:10:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:24,007 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:24,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:24,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:10:24,065 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:24,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:24,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:24,066 INFO L87 Difference]: Start difference. First operand 487 states and 3268 transitions. Second operand 10 states. [2019-02-18 10:10:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:24,736 INFO L93 Difference]: Finished difference Result 534 states and 3436 transitions. [2019-02-18 10:10:24,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:24,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:10:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:24,744 INFO L225 Difference]: With dead ends: 534 [2019-02-18 10:10:24,744 INFO L226 Difference]: Without dead ends: 533 [2019-02-18 10:10:24,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:10:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2019-02-18 10:10:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 505. [2019-02-18 10:10:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-02-18 10:10:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 3394 transitions. [2019-02-18 10:10:24,875 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 3394 transitions. Word has length 6 [2019-02-18 10:10:24,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:24,875 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 3394 transitions. [2019-02-18 10:10:24,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 3394 transitions. [2019-02-18 10:10:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:24,876 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:24,876 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:24,877 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash 904806422, now seen corresponding path program 1 times [2019-02-18 10:10:24,877 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:24,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:24,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:24,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:24,878 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:24,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:24,985 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:24,985 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:24,986 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [28], [29] [2019-02-18 10:10:24,987 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:24,987 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:25,290 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:25,290 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:25,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:25,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:25,291 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:25,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:25,300 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:25,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:25,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:25,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:10:25,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:10:25,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:10:25,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,356 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:10:25,366 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:10:25,378 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,418 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,442 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,460 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,474 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,489 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:10:25,537 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,540 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:10:25,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:10:25,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:10:25,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:10:25,719 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,745 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,771 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,797 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,826 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,873 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:25,873 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-02-18 10:10:25,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-02-18 10:10:25,911 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:25,955 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:25,955 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-02-18 10:10:25,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,987 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,991 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,993 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:25,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2019-02-18 10:10:25,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:26,043 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:26,044 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-02-18 10:10:26,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,077 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,086 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:26,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:26,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 114 [2019-02-18 10:10:26,088 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:26,138 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:26,139 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2019-02-18 10:10:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:26,163 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:26,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:26,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:10:26,243 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:26,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:26,244 INFO L87 Difference]: Start difference. First operand 505 states and 3394 transitions. Second operand 10 states. [2019-02-18 10:10:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:26,946 INFO L93 Difference]: Finished difference Result 543 states and 3439 transitions. [2019-02-18 10:10:26,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:26,946 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:10:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:26,952 INFO L225 Difference]: With dead ends: 543 [2019-02-18 10:10:26,952 INFO L226 Difference]: Without dead ends: 542 [2019-02-18 10:10:26,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:10:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2019-02-18 10:10:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 500. [2019-02-18 10:10:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-02-18 10:10:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3359 transitions. [2019-02-18 10:10:27,076 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3359 transitions. Word has length 6 [2019-02-18 10:10:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:27,076 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3359 transitions. [2019-02-18 10:10:27,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3359 transitions. [2019-02-18 10:10:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:27,078 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:27,078 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:27,085 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:27,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash 904796812, now seen corresponding path program 1 times [2019-02-18 10:10:27,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:27,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:27,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:27,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:27,086 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:27,237 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-02-18 10:10:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:27,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:27,641 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:27,641 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:27,641 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [28], [29] [2019-02-18 10:10:27,642 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:27,642 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:27,935 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:27,935 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:27,935 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:27,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:27,936 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:27,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:27,945 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:27,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:27,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:27,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:10:27,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:27,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:27,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:10:27,983 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:27,985 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:27,987 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:27,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:10:27,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:27,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,000 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,002 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:10:28,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,021 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:10:28,021 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,065 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,089 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,106 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,119 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,134 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:10:28,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,182 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:10:28,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,222 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,226 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:10:28,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:10:28,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:10:28,356 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,382 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,408 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,435 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,464 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,511 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:28,512 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-02-18 10:10:28,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-02-18 10:10:28,548 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,593 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:28,594 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-02-18 10:10:28,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2019-02-18 10:10:28,631 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,702 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:28,702 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-02-18 10:10:28,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:28,745 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:28,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-02-18 10:10:28,746 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:28,796 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:28,796 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2019-02-18 10:10:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:28,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:28,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:28,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:10:28,881 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:28,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:28,882 INFO L87 Difference]: Start difference. First operand 500 states and 3359 transitions. Second operand 10 states. [2019-02-18 10:10:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:29,583 INFO L93 Difference]: Finished difference Result 537 states and 3427 transitions. [2019-02-18 10:10:29,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:29,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:10:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:29,589 INFO L225 Difference]: With dead ends: 537 [2019-02-18 10:10:29,589 INFO L226 Difference]: Without dead ends: 536 [2019-02-18 10:10:29,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:10:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2019-02-18 10:10:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 501. [2019-02-18 10:10:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2019-02-18 10:10:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 3366 transitions. [2019-02-18 10:10:29,708 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 3366 transitions. Word has length 6 [2019-02-18 10:10:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:29,708 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 3366 transitions. [2019-02-18 10:10:29,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 3366 transitions. [2019-02-18 10:10:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:29,709 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:29,709 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:29,709 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash 904848706, now seen corresponding path program 1 times [2019-02-18 10:10:29,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:29,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:29,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:29,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:29,710 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:30,059 WARN L181 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2019-02-18 10:10:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:30,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:30,105 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:30,105 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:30,105 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [29] [2019-02-18 10:10:30,106 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:30,106 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:30,401 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:30,401 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:30,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:30,402 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:30,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:30,402 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:30,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:30,412 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:30,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:30,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:30,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:30,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:30,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:30,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,489 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:30,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,525 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:10:30,540 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,611 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,635 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,655 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,670 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,685 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:30,722 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:10:30,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,765 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:10:30,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,815 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:10:30,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:30,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:10:31,029 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-02-18 10:10:31,032 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,036 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,038 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:10:31,042 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,068 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,114 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,141 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,169 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,219 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:31,220 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:10:31,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:10:31,258 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,304 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:31,304 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:10:31,336 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,337 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,338 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,340 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,341 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,343 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:31,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-02-18 10:10:31,344 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,393 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:31,393 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-02-18 10:10:31,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,420 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,421 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,422 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,423 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,424 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,427 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,428 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,429 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,430 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:31,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-02-18 10:10:31,432 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:31,489 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:31,490 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-02-18 10:10:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:31,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:31,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:31,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:10:31,590 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:31,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:31,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:31,590 INFO L87 Difference]: Start difference. First operand 501 states and 3366 transitions. Second operand 10 states. [2019-02-18 10:10:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:32,378 INFO L93 Difference]: Finished difference Result 588 states and 3737 transitions. [2019-02-18 10:10:32,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:32,379 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:10:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:32,383 INFO L225 Difference]: With dead ends: 588 [2019-02-18 10:10:32,383 INFO L226 Difference]: Without dead ends: 587 [2019-02-18 10:10:32,384 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:10:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-02-18 10:10:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 534. [2019-02-18 10:10:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2019-02-18 10:10:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 3605 transitions. [2019-02-18 10:10:32,517 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 3605 transitions. Word has length 6 [2019-02-18 10:10:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:32,517 INFO L480 AbstractCegarLoop]: Abstraction has 534 states and 3605 transitions. [2019-02-18 10:10:32,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 3605 transitions. [2019-02-18 10:10:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:32,518 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:32,518 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:32,518 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:32,519 INFO L82 PathProgramCache]: Analyzing trace with hash 904869912, now seen corresponding path program 1 times [2019-02-18 10:10:32,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:32,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:32,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:32,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:32,520 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:32,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:32,594 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:32,594 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:32,594 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [28], [30], [31] [2019-02-18 10:10:32,595 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:32,595 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:32,888 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:32,888 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:10:32,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:32,888 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:32,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:32,889 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:32,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:32,909 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:32,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:32,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:32,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:10:33,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:10:33,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,191 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,192 INFO L303 Elim1Store]: Index analysis took 107 ms [2019-02-18 10:10:33,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:10:33,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,323 INFO L303 Elim1Store]: Index analysis took 129 ms [2019-02-18 10:10:33,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:10:33,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,388 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,439 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,458 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:33,486 INFO L303 Elim1Store]: Index analysis took 160 ms [2019-02-18 10:10:33,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:10:33,488 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:33,967 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:33,988 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,007 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,021 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,035 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:10:34,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:10:34,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,128 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,129 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:10:34,181 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:10:34,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:10:34,265 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,291 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,317 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,343 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,372 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,419 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:34,420 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-02-18 10:10:34,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-02-18 10:10:34,450 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,495 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:34,496 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-02-18 10:10:34,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,521 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,523 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:34,526 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:34,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2019-02-18 10:10:34,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:34,593 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:34,594 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:55 [2019-02-18 10:10:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:34,615 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:34,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:34,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:10:34,657 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:34,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:34,658 INFO L87 Difference]: Start difference. First operand 534 states and 3605 transitions. Second operand 8 states. [2019-02-18 10:10:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:35,168 INFO L93 Difference]: Finished difference Result 558 states and 3635 transitions. [2019-02-18 10:10:35,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:10:35,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-02-18 10:10:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:35,172 INFO L225 Difference]: With dead ends: 558 [2019-02-18 10:10:35,172 INFO L226 Difference]: Without dead ends: 557 [2019-02-18 10:10:35,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:10:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2019-02-18 10:10:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 533. [2019-02-18 10:10:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2019-02-18 10:10:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 3598 transitions. [2019-02-18 10:10:35,294 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 3598 transitions. Word has length 6 [2019-02-18 10:10:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:35,294 INFO L480 AbstractCegarLoop]: Abstraction has 533 states and 3598 transitions. [2019-02-18 10:10:35,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 3598 transitions. [2019-02-18 10:10:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:35,295 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:35,295 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:35,295 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:35,296 INFO L82 PathProgramCache]: Analyzing trace with hash 904431632, now seen corresponding path program 1 times [2019-02-18 10:10:35,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:35,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:35,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:35,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:35,296 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:35,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:35,383 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:35,383 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:35,383 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [29] [2019-02-18 10:10:35,385 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:35,386 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:35,664 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:35,664 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:35,665 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:35,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:35,665 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:35,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:35,674 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:35,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:35,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:10:35,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:10:35,791 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,792 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,795 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:10:35,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:35,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:10:35,852 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:35,872 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:35,892 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:35,910 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:35,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:35,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:35,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:35,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:35,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:35,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:10:35,959 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:35,990 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:36,012 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:36,031 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:36,047 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:36,061 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:36,100 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:36,101 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:10:36,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:10:36,145 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:36,175 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:36,175 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:10:36,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,202 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:36,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-02-18 10:10:36,204 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:36,241 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:36,241 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:42 [2019-02-18 10:10:36,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,267 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,268 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,268 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,272 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:36,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2019-02-18 10:10:36,275 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:36,312 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:36,313 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2019-02-18 10:10:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:36,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:36,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:36,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:10:36,384 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:36,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:36,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:36,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:10:36,385 INFO L87 Difference]: Start difference. First operand 533 states and 3598 transitions. Second operand 10 states. [2019-02-18 10:10:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:37,158 INFO L93 Difference]: Finished difference Result 795 states and 5176 transitions. [2019-02-18 10:10:37,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:10:37,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:10:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:37,164 INFO L225 Difference]: With dead ends: 795 [2019-02-18 10:10:37,165 INFO L226 Difference]: Without dead ends: 794 [2019-02-18 10:10:37,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2019-02-18 10:10:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 484. [2019-02-18 10:10:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-02-18 10:10:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 3230 transitions. [2019-02-18 10:10:37,319 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 3230 transitions. Word has length 6 [2019-02-18 10:10:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:37,319 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 3230 transitions. [2019-02-18 10:10:37,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:37,320 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 3230 transitions. [2019-02-18 10:10:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:37,321 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:37,321 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:37,322 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:37,322 INFO L82 PathProgramCache]: Analyzing trace with hash 904452838, now seen corresponding path program 1 times [2019-02-18 10:10:37,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:37,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:37,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:37,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:37,323 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:37,554 WARN L181 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-02-18 10:10:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:37,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:37,599 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:37,600 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:37,600 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [28], [30], [31] [2019-02-18 10:10:37,600 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:37,600 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:37,812 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:37,812 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:10:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:37,813 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:37,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:37,813 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:37,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:37,822 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:37,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:37,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:37,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:10:37,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:10:37,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:10:37,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:37,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:10:37,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:10:37,892 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,926 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,949 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,967 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,979 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:37,993 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:10:38,032 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:10:38,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:10:38,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,118 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:10:38,123 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,140 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,155 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,173 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,206 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:38,206 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-02-18 10:10:38,251 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-02-18 10:10:38,252 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:38,279 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:38,280 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-02-18 10:10:38,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:38,311 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:38,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 81 [2019-02-18 10:10:38,322 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:10:38,421 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:10:38,421 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:76 [2019-02-18 10:10:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:38,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:38,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:38,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-02-18 10:10:38,509 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:38,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-02-18 10:10:38,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-02-18 10:10:38,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:10:38,509 INFO L87 Difference]: Start difference. First operand 484 states and 3230 transitions. Second operand 9 states. [2019-02-18 10:10:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:39,258 INFO L93 Difference]: Finished difference Result 539 states and 3425 transitions. [2019-02-18 10:10:39,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:10:39,259 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-02-18 10:10:39,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:39,262 INFO L225 Difference]: With dead ends: 539 [2019-02-18 10:10:39,263 INFO L226 Difference]: Without dead ends: 538 [2019-02-18 10:10:39,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:10:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-02-18 10:10:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 500. [2019-02-18 10:10:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-02-18 10:10:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3342 transitions. [2019-02-18 10:10:39,480 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3342 transitions. Word has length 6 [2019-02-18 10:10:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:39,481 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3342 transitions. [2019-02-18 10:10:39,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-02-18 10:10:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3342 transitions. [2019-02-18 10:10:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:39,482 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:39,482 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-02-18 10:10:39,482 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:39,482 INFO L82 PathProgramCache]: Analyzing trace with hash 893599114, now seen corresponding path program 4 times [2019-02-18 10:10:39,482 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:39,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:39,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:39,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:39,483 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:39,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:39,577 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:39,577 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:10:39,578 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:10:39,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:39,578 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:39,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:39,586 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:39,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:39,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:39,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:39,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:39,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:39,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:39,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:10:39,650 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,680 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,703 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,723 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,736 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,751 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:10:39,817 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,818 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:10:39,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:10:39,908 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:39,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:10:39,955 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,973 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:39,990 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,008 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,044 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:40,044 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:10:40,258 WARN L181 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 10:10:40,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-02-18 10:10:40,307 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:10:40,424 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-02-18 10:10:40,425 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2019-02-18 10:10:40,616 WARN L181 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-02-18 10:10:40,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 81 [2019-02-18 10:10:40,638 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:40,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:40,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 91 [2019-02-18 10:10:40,742 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-02-18 10:10:40,879 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2019-02-18 10:10:40,880 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:129, output treesize:126 [2019-02-18 10:10:41,499 WARN L181 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2019-02-18 10:10:41,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,518 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,523 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,525 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,527 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,528 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,529 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 101 [2019-02-18 10:10:41,531 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:41,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,646 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,647 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,651 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 111 [2019-02-18 10:10:41,653 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:41,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,777 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,782 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,790 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:41,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-02-18 10:10:41,791 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:41,886 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-02-18 10:10:41,887 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:159, output treesize:123 [2019-02-18 10:10:42,123 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-02-18 10:10:42,129 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,130 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,130 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 125 [2019-02-18 10:10:42,178 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-02-18 10:10:42,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,525 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,527 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,529 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,530 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,531 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,532 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,533 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,534 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,535 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,536 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-02-18 10:10:42,538 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,708 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:42,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:42,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-02-18 10:10:42,711 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:42,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-02-18 10:10:42,851 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:238 [2019-02-18 10:10:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:42,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:43,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:43,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-02-18 10:10:43,088 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:43,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-02-18 10:10:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-02-18 10:10:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:10:43,089 INFO L87 Difference]: Start difference. First operand 500 states and 3342 transitions. Second operand 11 states. [2019-02-18 10:10:43,319 WARN L181 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-02-18 10:10:43,985 WARN L181 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2019-02-18 10:10:44,485 WARN L181 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2019-02-18 10:10:45,013 WARN L181 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2019-02-18 10:10:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:45,879 INFO L93 Difference]: Finished difference Result 678 states and 4253 transitions. [2019-02-18 10:10:45,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-18 10:10:45,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-02-18 10:10:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:45,884 INFO L225 Difference]: With dead ends: 678 [2019-02-18 10:10:45,884 INFO L226 Difference]: Without dead ends: 673 [2019-02-18 10:10:45,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2019-02-18 10:10:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-02-18 10:10:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 555. [2019-02-18 10:10:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2019-02-18 10:10:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 3727 transitions. [2019-02-18 10:10:46,130 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 3727 transitions. Word has length 6 [2019-02-18 10:10:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:46,130 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 3727 transitions. [2019-02-18 10:10:46,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-02-18 10:10:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 3727 transitions. [2019-02-18 10:10:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:46,131 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:46,131 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-02-18 10:10:46,131 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:46,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:46,132 INFO L82 PathProgramCache]: Analyzing trace with hash 893598680, now seen corresponding path program 2 times [2019-02-18 10:10:46,132 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:46,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:46,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:46,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:46,133 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:46,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:46,288 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:46,288 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:10:46,288 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:10:46,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:46,288 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:46,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:10:46,297 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:10:46,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:10:46,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:10:46,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:46,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:46,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:46,336 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,337 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:46,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:46,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:46,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,361 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,362 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,364 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:10:46,365 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,410 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,436 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,456 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,472 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,487 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,523 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:10:46,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,568 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:10:46,613 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:10:46,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:10:46,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,755 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,757 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:10:46,758 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,787 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,815 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,850 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,878 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:46,929 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:46,930 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-02-18 10:10:46,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:46,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:10:46,967 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,019 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:47,019 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:10:47,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 10:10:47,056 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,116 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:47,117 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-02-18 10:10:47,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,251 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-02-18 10:10:47,258 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,316 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:47,316 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:55 [2019-02-18 10:10:47,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,340 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,341 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:47,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 135 [2019-02-18 10:10:47,357 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:47,418 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:47,418 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:45 [2019-02-18 10:10:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:47,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:47,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:47,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-02-18 10:10:47,513 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:47,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-02-18 10:10:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-02-18 10:10:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:10:47,514 INFO L87 Difference]: Start difference. First operand 555 states and 3727 transitions. Second operand 11 states. [2019-02-18 10:10:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:48,396 INFO L93 Difference]: Finished difference Result 704 states and 4501 transitions. [2019-02-18 10:10:48,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-18 10:10:48,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-02-18 10:10:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:48,401 INFO L225 Difference]: With dead ends: 704 [2019-02-18 10:10:48,401 INFO L226 Difference]: Without dead ends: 703 [2019-02-18 10:10:48,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-02-18 10:10:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-02-18 10:10:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 655. [2019-02-18 10:10:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2019-02-18 10:10:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 4427 transitions. [2019-02-18 10:10:48,618 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 4427 transitions. Word has length 6 [2019-02-18 10:10:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:48,618 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 4427 transitions. [2019-02-18 10:10:48,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-02-18 10:10:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 4427 transitions. [2019-02-18 10:10:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:48,619 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:48,619 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:48,619 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:48,620 INFO L82 PathProgramCache]: Analyzing trace with hash 893604446, now seen corresponding path program 2 times [2019-02-18 10:10:48,620 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:48,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:48,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:10:48,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:48,620 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:48,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:48,827 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:48,827 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:10:48,827 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:10:48,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:48,828 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:48,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:10:48,838 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:10:48,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:10:48,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:10:48,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:48,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:48,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:48,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:48,894 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:48,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,904 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,905 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:48,911 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,911 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,912 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,914 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:48,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:10:48,916 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:48,967 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:48,992 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,012 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,028 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,043 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:10:49,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:10:49,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:10:49,228 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,230 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,234 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:10:49,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,309 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:10:49,315 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,342 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,370 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,398 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,427 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,477 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:49,478 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:10:49,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:10:49,518 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,568 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:49,569 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-02-18 10:10:49,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 10:10:49,644 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,696 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:49,696 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-02-18 10:10:49,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,740 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:49,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-02-18 10:10:49,743 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,799 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:49,799 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-02-18 10:10:49,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,838 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:49,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:49,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-02-18 10:10:49,841 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:49,896 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:49,897 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-02-18 10:10:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:49,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:50,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:50,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-02-18 10:10:50,010 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:50,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:10:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:10:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:10:50,011 INFO L87 Difference]: Start difference. First operand 655 states and 4427 transitions. Second operand 12 states. [2019-02-18 10:10:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:51,418 INFO L93 Difference]: Finished difference Result 1218 states and 7896 transitions. [2019-02-18 10:10:51,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-02-18 10:10:51,419 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:10:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:51,427 INFO L225 Difference]: With dead ends: 1218 [2019-02-18 10:10:51,427 INFO L226 Difference]: Without dead ends: 1217 [2019-02-18 10:10:51,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2019-02-18 10:10:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2019-02-18 10:10:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 738. [2019-02-18 10:10:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2019-02-18 10:10:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 5008 transitions. [2019-02-18 10:10:51,855 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 5008 transitions. Word has length 6 [2019-02-18 10:10:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:51,855 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 5008 transitions. [2019-02-18 10:10:51,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:10:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 5008 transitions. [2019-02-18 10:10:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:51,856 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:51,856 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:51,856 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:51,857 INFO L82 PathProgramCache]: Analyzing trace with hash 893724170, now seen corresponding path program 1 times [2019-02-18 10:10:51,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:51,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:51,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:10:51,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:51,857 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:51,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:51,959 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:51,959 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:51,959 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [29] [2019-02-18 10:10:51,962 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:51,962 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:52,275 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:52,275 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:52,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:52,276 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:52,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:52,276 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:52,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:52,288 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:52,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:52,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:52,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:52,336 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,339 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:52,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:52,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,363 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:52,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:10:52,384 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,430 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,455 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,474 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,489 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,504 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,540 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:10:52,580 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:10:52,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:10:52,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:10:52,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:10:52,774 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,802 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,830 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,858 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,887 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:52,936 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:52,937 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:10:52,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:52,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:10:52,975 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:53,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:53,023 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:10:53,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,065 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:53,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-02-18 10:10:53,067 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:53,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:53,118 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:59 [2019-02-18 10:10:53,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:53,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-02-18 10:10:53,159 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:53,212 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:53,212 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:47 [2019-02-18 10:10:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:53,237 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:53,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:53,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:10:53,296 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:53,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:10:53,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:10:53,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:10:53,296 INFO L87 Difference]: Start difference. First operand 738 states and 5008 transitions. Second operand 10 states. [2019-02-18 10:10:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:54,138 INFO L93 Difference]: Finished difference Result 814 states and 5311 transitions. [2019-02-18 10:10:54,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:54,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:10:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:54,142 INFO L225 Difference]: With dead ends: 814 [2019-02-18 10:10:54,142 INFO L226 Difference]: Without dead ends: 811 [2019-02-18 10:10:54,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:10:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-02-18 10:10:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 775. [2019-02-18 10:10:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2019-02-18 10:10:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 5267 transitions. [2019-02-18 10:10:54,448 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 5267 transitions. Word has length 6 [2019-02-18 10:10:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:54,448 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 5267 transitions. [2019-02-18 10:10:54,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:10:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 5267 transitions. [2019-02-18 10:10:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:54,450 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:54,450 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:54,450 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:54,450 INFO L82 PathProgramCache]: Analyzing trace with hash 893714560, now seen corresponding path program 1 times [2019-02-18 10:10:54,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:54,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:54,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:54,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:54,451 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:54,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:54,561 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:54,561 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:54,561 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [28], [29] [2019-02-18 10:10:54,563 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:54,563 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:54,841 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:54,841 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:54,842 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:54,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:54,842 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:54,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:54,851 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:54,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:54,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:10:54,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,926 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:10:54,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:54,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:10:55,021 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:10:55,028 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,047 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,065 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,082 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:55,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:10:55,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:10:55,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:10:55,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:10:55,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:10:55,131 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,160 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,180 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,197 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,211 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,224 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,260 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:55,260 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:10:55,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:10:55,321 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,353 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:55,353 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-02-18 10:10:55,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,385 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,387 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,389 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,389 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:55,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-02-18 10:10:55,390 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,424 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:55,424 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2019-02-18 10:10:55,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:55,457 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:10:55,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-02-18 10:10:55,459 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:55,492 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:55,492 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:42 [2019-02-18 10:10:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:55,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:55,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:55,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-02-18 10:10:55,578 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:55,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-02-18 10:10:55,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-02-18 10:10:55,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:10:55,579 INFO L87 Difference]: Start difference. First operand 775 states and 5267 transitions. Second operand 9 states. [2019-02-18 10:10:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:56,467 INFO L93 Difference]: Finished difference Result 812 states and 5339 transitions. [2019-02-18 10:10:56,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:56,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-02-18 10:10:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:56,471 INFO L225 Difference]: With dead ends: 812 [2019-02-18 10:10:56,471 INFO L226 Difference]: Without dead ends: 811 [2019-02-18 10:10:56,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:10:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-02-18 10:10:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 780. [2019-02-18 10:10:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2019-02-18 10:10:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 5302 transitions. [2019-02-18 10:10:56,789 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 5302 transitions. Word has length 6 [2019-02-18 10:10:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:56,789 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 5302 transitions. [2019-02-18 10:10:56,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-02-18 10:10:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 5302 transitions. [2019-02-18 10:10:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:56,790 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:56,790 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:56,791 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash 893787660, now seen corresponding path program 1 times [2019-02-18 10:10:56,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:56,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:56,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:56,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:56,792 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:56,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:56,870 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:56,870 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:56,870 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [30], [31] [2019-02-18 10:10:56,871 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:56,871 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:57,110 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:57,110 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:10:57,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:57,111 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:57,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:57,111 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:57,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:57,120 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:57,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:57,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:10:57,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:10:57,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:10:57,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:10:57,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:10:57,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,181 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:10:57,191 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,241 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,264 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,283 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,298 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,312 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:10:57,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,361 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:10:57,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:10:57,459 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:10:57,533 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,534 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,535 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,536 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,537 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,539 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,540 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,542 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:10:57,543 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,567 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,591 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,618 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,647 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:10:57,693 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:57,693 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-02-18 10:10:57,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:57,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:10:57,949 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:10:58,233 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:10:58,233 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-02-18 10:10:58,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:58,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:58,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:58,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-02-18 10:10:58,287 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:10:58,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:10:58,324 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:38 [2019-02-18 10:10:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:58,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:10:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:10:58,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:10:58,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:10:58,463 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:10:58,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:10:58,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:10:58,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:10:58,464 INFO L87 Difference]: Start difference. First operand 780 states and 5302 transitions. Second operand 8 states. [2019-02-18 10:10:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:10:59,179 INFO L93 Difference]: Finished difference Result 843 states and 5575 transitions. [2019-02-18 10:10:59,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:10:59,179 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-02-18 10:10:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:10:59,181 INFO L225 Difference]: With dead ends: 843 [2019-02-18 10:10:59,181 INFO L226 Difference]: Without dead ends: 842 [2019-02-18 10:10:59,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-02-18 10:10:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2019-02-18 10:10:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 813. [2019-02-18 10:10:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2019-02-18 10:10:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 5533 transitions. [2019-02-18 10:10:59,529 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 5533 transitions. Word has length 6 [2019-02-18 10:10:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:10:59,529 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 5533 transitions. [2019-02-18 10:10:59,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:10:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 5533 transitions. [2019-02-18 10:10:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:10:59,531 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:10:59,531 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:10:59,531 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:10:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:59,531 INFO L82 PathProgramCache]: Analyzing trace with hash 893774142, now seen corresponding path program 1 times [2019-02-18 10:10:59,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:10:59,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:59,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:59,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:10:59,532 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:10:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:10:59,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:59,600 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:10:59,600 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:10:59,600 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [29] [2019-02-18 10:10:59,601 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:10:59,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:10:59,899 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:10:59,899 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:10:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:10:59,900 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:10:59,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:10:59,900 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:10:59,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:10:59,915 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:10:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:10:59,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:10:59,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:59,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:10:59,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:59,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:10:59,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:11:00,035 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:11:00,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:11:00,099 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,121 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,142 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,165 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:11:00,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:11:00,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:11:00,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:11:00,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:11:00,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:11:00,221 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,251 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,273 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,291 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,305 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,318 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:00,351 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:00,351 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:11:00,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-02-18 10:11:00,466 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:11:00,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:11:00,585 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2019-02-18 10:11:00,696 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-02-18 10:11:00,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:00,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 103 [2019-02-18 10:11:00,755 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-02-18 10:11:01,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,101 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:01,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 88 [2019-02-18 10:11:01,102 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:01,289 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 19 dim-0 vars, and 6 xjuncts. [2019-02-18 10:11:01,289 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:126, output treesize:278 [2019-02-18 10:11:01,606 WARN L181 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2019-02-18 10:11:01,613 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 88 [2019-02-18 10:11:01,614 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:01,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,754 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:01,755 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 100 [2019-02-18 10:11:01,757 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:01,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,892 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,894 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,897 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:01,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:01,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 94 [2019-02-18 10:11:01,899 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:02,052 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:02,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-02-18 10:11:02,053 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:02,165 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2019-02-18 10:11:02,166 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:227, output treesize:173 [2019-02-18 10:11:02,297 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2019-02-18 10:11:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:02,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:02,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:02,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:11:02,383 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:02,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:11:02,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:11:02,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:11:02,384 INFO L87 Difference]: Start difference. First operand 813 states and 5533 transitions. Second operand 10 states. [2019-02-18 10:11:02,584 WARN L181 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2019-02-18 10:11:02,842 WARN L181 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-02-18 10:11:03,255 WARN L181 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2019-02-18 10:11:04,002 WARN L181 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-02-18 10:11:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:04,319 INFO L93 Difference]: Finished difference Result 896 states and 5824 transitions. [2019-02-18 10:11:04,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:11:04,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:11:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:04,324 INFO L225 Difference]: With dead ends: 896 [2019-02-18 10:11:04,324 INFO L226 Difference]: Without dead ends: 895 [2019-02-18 10:11:04,324 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2019-02-18 10:11:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2019-02-18 10:11:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 848. [2019-02-18 10:11:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2019-02-18 10:11:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 5778 transitions. [2019-02-18 10:11:04,661 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 5778 transitions. Word has length 6 [2019-02-18 10:11:04,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:04,661 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 5778 transitions. [2019-02-18 10:11:04,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:11:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 5778 transitions. [2019-02-18 10:11:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:11:04,663 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:04,663 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:11:04,663 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:04,663 INFO L82 PathProgramCache]: Analyzing trace with hash 893364756, now seen corresponding path program 1 times [2019-02-18 10:11:04,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:04,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:04,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:04,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:04,664 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:04,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:04,737 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:04,737 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:11:04,737 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [22], [28], [29] [2019-02-18 10:11:04,739 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:11:04,739 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:05,046 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:05,046 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:11:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:05,047 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:05,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:05,047 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:11:05,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:05,055 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:05,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:05,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:11:05,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:11:05,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:11:05,223 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,226 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,228 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,229 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:11:05,230 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,248 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,266 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,282 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:11:05,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:11:05,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:11:05,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:11:05,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:11:05,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:11:05,330 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,358 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,378 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,395 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,410 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,423 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,459 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:05,459 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-02-18 10:11:05,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:11:05,509 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,542 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:05,542 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-02-18 10:11:05,568 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,569 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,572 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,573 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-02-18 10:11:05,575 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,613 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:05,613 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2019-02-18 10:11:05,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:05,645 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:05,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-02-18 10:11:05,647 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:05,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:05,812 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-02-18 10:11:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:05,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:05,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:05,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:11:05,888 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:05,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:11:05,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:11:05,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:11:05,889 INFO L87 Difference]: Start difference. First operand 848 states and 5778 transitions. Second operand 10 states. [2019-02-18 10:11:06,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:06,925 INFO L93 Difference]: Finished difference Result 975 states and 6393 transitions. [2019-02-18 10:11:06,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:11:06,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:11:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:06,930 INFO L225 Difference]: With dead ends: 975 [2019-02-18 10:11:06,930 INFO L226 Difference]: Without dead ends: 973 [2019-02-18 10:11:06,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:11:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2019-02-18 10:11:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 930. [2019-02-18 10:11:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2019-02-18 10:11:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 6346 transitions. [2019-02-18 10:11:07,306 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 6346 transitions. Word has length 6 [2019-02-18 10:11:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:07,306 INFO L480 AbstractCegarLoop]: Abstraction has 930 states and 6346 transitions. [2019-02-18 10:11:07,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:11:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 6346 transitions. [2019-02-18 10:11:07,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:11:07,308 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:07,308 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:11:07,308 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:07,309 INFO L82 PathProgramCache]: Analyzing trace with hash 893370586, now seen corresponding path program 1 times [2019-02-18 10:11:07,309 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:07,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:07,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:07,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:07,310 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:11:07,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:07,435 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:07,435 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:11:07,435 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [30], [31] [2019-02-18 10:11:07,436 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:11:07,436 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:07,706 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:07,707 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:11:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:07,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:07,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:07,707 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:11:07,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:07,716 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:07,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:07,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:11:07,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:11:07,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:11:07,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:11:07,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:11:07,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:11:07,793 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:07,824 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:07,848 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:07,866 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:07,880 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:07,895 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:07,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:11:07,937 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,939 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:11:07,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:07,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:11:08,021 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:11:08,029 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:08,046 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:08,062 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:08,080 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:08,114 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:08,114 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-02-18 10:11:08,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:11:08,163 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:11:08,264 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:11:08,265 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-02-18 10:11:08,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,309 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 86 [2019-02-18 10:11:08,311 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:08,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:08,385 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:08,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 59 [2019-02-18 10:11:08,386 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:08,434 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:11:08,434 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:108, output treesize:84 [2019-02-18 10:11:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:18,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:18,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:18,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:11:18,595 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:18,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:11:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:11:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=58, Unknown=1, NotChecked=0, Total=90 [2019-02-18 10:11:18,595 INFO L87 Difference]: Start difference. First operand 930 states and 6346 transitions. Second operand 8 states. [2019-02-18 10:11:19,034 WARN L181 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2019-02-18 10:11:19,209 WARN L181 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-02-18 10:11:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:20,085 INFO L93 Difference]: Finished difference Result 985 states and 6551 transitions. [2019-02-18 10:11:20,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:11:20,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-02-18 10:11:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:20,088 INFO L225 Difference]: With dead ends: 985 [2019-02-18 10:11:20,088 INFO L226 Difference]: Without dead ends: 984 [2019-02-18 10:11:20,089 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=69, Invalid=112, Unknown=1, NotChecked=0, Total=182 [2019-02-18 10:11:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2019-02-18 10:11:20,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 951. [2019-02-18 10:11:20,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2019-02-18 10:11:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 6492 transitions. [2019-02-18 10:11:20,488 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 6492 transitions. Word has length 6 [2019-02-18 10:11:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:20,489 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 6492 transitions. [2019-02-18 10:11:20,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:11:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 6492 transitions. [2019-02-18 10:11:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:11:20,491 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:20,491 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:11:20,491 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash 908380782, now seen corresponding path program 1 times [2019-02-18 10:11:20,491 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:20,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:20,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:20,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:20,492 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:20,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:20,600 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:20,600 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:11:20,600 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [24], [27] [2019-02-18 10:11:20,601 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:11:20,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:20,996 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:20,996 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:11:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:20,997 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:20,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:20,997 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:11:21,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:21,005 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:21,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:21,192 WARN L181 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-02-18 10:11:21,230 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:11:21,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:11:21,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,327 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,330 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:11:21,388 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:11:21,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:11:21,476 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,506 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,536 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,566 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,597 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:11:21,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:11:21,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:11:21,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:11:21,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:11:21,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:11:21,658 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,697 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,720 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,738 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,753 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,767 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,817 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:21,818 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-02-18 10:11:21,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:11:21,870 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:21,921 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:21,921 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-02-18 10:11:21,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,964 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,968 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:21,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 10:11:21,970 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:22,021 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:22,022 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-02-18 10:11:22,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,067 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:22,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-02-18 10:11:22,070 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:22,125 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:22,126 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-02-18 10:11:22,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,166 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,170 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:22,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:22,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-02-18 10:11:22,173 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:22,230 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:22,230 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-02-18 10:11:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:22,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:23,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:23,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-02-18 10:11:23,064 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:23,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:11:23,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:11:23,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:11:23,064 INFO L87 Difference]: Start difference. First operand 951 states and 6492 transitions. Second operand 12 states. [2019-02-18 10:11:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:37,134 INFO L93 Difference]: Finished difference Result 1024 states and 6701 transitions. [2019-02-18 10:11:37,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:11:37,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:11:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:37,139 INFO L225 Difference]: With dead ends: 1024 [2019-02-18 10:11:37,139 INFO L226 Difference]: Without dead ends: 1023 [2019-02-18 10:11:37,140 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-02-18 10:11:37,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2019-02-18 10:11:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 948. [2019-02-18 10:11:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2019-02-18 10:11:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 6467 transitions. [2019-02-18 10:11:37,529 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 6467 transitions. Word has length 6 [2019-02-18 10:11:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:37,529 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 6467 transitions. [2019-02-18 10:11:37,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:11:37,529 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 6467 transitions. [2019-02-18 10:11:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:11:37,531 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:37,531 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:11:37,531 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:37,531 INFO L82 PathProgramCache]: Analyzing trace with hash 908380906, now seen corresponding path program 1 times [2019-02-18 10:11:37,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:37,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:37,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:37,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:37,532 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:37,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:37,713 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:37,713 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:11:37,713 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [27] [2019-02-18 10:11:37,714 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:11:37,715 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:38,079 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:38,079 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:11:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:38,079 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:38,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:38,079 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:11:38,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:38,110 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:38,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:38,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:11:38,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:11:38,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:11:38,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:11:38,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:11:38,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:11:38,178 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,234 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,261 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,283 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,298 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,313 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:11:38,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:11:38,439 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,441 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,443 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:11:38,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,504 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,505 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:11:38,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,580 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:11:38,589 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,616 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,645 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,672 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,701 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,752 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:38,752 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-02-18 10:11:38,801 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:11:38,803 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,853 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:38,853 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-02-18 10:11:38,892 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,893 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 10:11:38,902 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:38,954 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:38,955 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-02-18 10:11:38,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,992 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,993 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,996 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:38,999 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,000 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,003 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:39,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-02-18 10:11:39,006 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:39,062 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:39,063 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-02-18 10:11:39,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,108 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:39,113 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:39,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2019-02-18 10:11:39,114 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:39,170 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:39,170 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2019-02-18 10:11:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:39,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:39,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:39,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-02-18 10:11:39,277 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:39,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:11:39,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:11:39,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:11:39,278 INFO L87 Difference]: Start difference. First operand 948 states and 6467 transitions. Second operand 12 states. [2019-02-18 10:11:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:40,644 INFO L93 Difference]: Finished difference Result 1059 states and 6958 transitions. [2019-02-18 10:11:40,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-18 10:11:40,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:11:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:40,649 INFO L225 Difference]: With dead ends: 1059 [2019-02-18 10:11:40,649 INFO L226 Difference]: Without dead ends: 1057 [2019-02-18 10:11:40,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-02-18 10:11:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-02-18 10:11:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 945. [2019-02-18 10:11:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2019-02-18 10:11:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 6457 transitions. [2019-02-18 10:11:41,072 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 6457 transitions. Word has length 6 [2019-02-18 10:11:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:41,072 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 6457 transitions. [2019-02-18 10:11:41,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:11:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 6457 transitions. [2019-02-18 10:11:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:11:41,074 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:41,074 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:11:41,074 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash 908367452, now seen corresponding path program 1 times [2019-02-18 10:11:41,074 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:41,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:41,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:41,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:41,075 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:41,250 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-02-18 10:11:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:41,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:41,296 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:41,296 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:11:41,297 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [27] [2019-02-18 10:11:41,298 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:11:41,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:41,659 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:41,660 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:11:41,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:41,660 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:41,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:41,660 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:11:41,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:41,668 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:41,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:41,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:11:41,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:11:41,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:11:41,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:11:41,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:11:41,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:11:41,752 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:41,785 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:41,810 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:41,830 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:41,846 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:41,860 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:41,892 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:11:41,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:11:41,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:41,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:11:42,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:11:42,029 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:42,045 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:42,063 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:42,081 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:42,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:42,117 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2019-02-18 10:11:42,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:11:42,190 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:42,222 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:42,222 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-02-18 10:11:42,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 10:11:42,262 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:42,294 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:42,294 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:38 [2019-02-18 10:11:42,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,321 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,322 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,327 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,330 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:42,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-02-18 10:11:42,333 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:42,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:42,370 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2019-02-18 10:11:42,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,397 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:42,409 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:42,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2019-02-18 10:11:42,411 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:42,448 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:42,448 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2019-02-18 10:11:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:42,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:42,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:42,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-02-18 10:11:42,573 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:42,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:11:42,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:11:42,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:11:42,573 INFO L87 Difference]: Start difference. First operand 945 states and 6457 transitions. Second operand 12 states. [2019-02-18 10:11:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:44,937 INFO L93 Difference]: Finished difference Result 1044 states and 6871 transitions. [2019-02-18 10:11:44,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:11:44,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:11:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:44,942 INFO L225 Difference]: With dead ends: 1044 [2019-02-18 10:11:44,942 INFO L226 Difference]: Without dead ends: 1042 [2019-02-18 10:11:44,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-02-18 10:11:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2019-02-18 10:11:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 982. [2019-02-18 10:11:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2019-02-18 10:11:45,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 6716 transitions. [2019-02-18 10:11:45,353 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 6716 transitions. Word has length 6 [2019-02-18 10:11:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:45,353 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 6716 transitions. [2019-02-18 10:11:45,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:11:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 6716 transitions. [2019-02-18 10:11:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:11:45,355 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:45,355 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:11:45,355 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:45,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:45,356 INFO L82 PathProgramCache]: Analyzing trace with hash 908371606, now seen corresponding path program 2 times [2019-02-18 10:11:45,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:45,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:45,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:45,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:45,356 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:45,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:45,508 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:45,508 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:11:45,508 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:11:45,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:45,508 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:11:45,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:11:45,517 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:11:45,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:11:45,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:11:45,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:45,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:11:45,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:11:45,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:11:45,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:11:45,776 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,777 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,779 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:45,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:11:45,785 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:45,815 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:45,845 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:45,875 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:45,906 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:45,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:11:45,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:11:45,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:11:45,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:11:45,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:11:45,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:11:45,963 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,000 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,023 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,041 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,056 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,068 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,139 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:46,139 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-02-18 10:11:46,191 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,192 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:11:46,192 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,244 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:46,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-02-18 10:11:46,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 10:11:46,292 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,341 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:46,342 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-02-18 10:11:46,375 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,387 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,388 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,391 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:46,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-02-18 10:11:46,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,450 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:46,450 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-02-18 10:11:46,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,487 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,489 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,499 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:46,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:46,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-02-18 10:11:46,502 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:46,558 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:46,559 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-02-18 10:11:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:46,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:46,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:46,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-02-18 10:11:46,673 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:46,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:11:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:11:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:11:46,674 INFO L87 Difference]: Start difference. First operand 982 states and 6716 transitions. Second operand 12 states. [2019-02-18 10:11:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:48,073 INFO L93 Difference]: Finished difference Result 1044 states and 6839 transitions. [2019-02-18 10:11:48,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:11:48,074 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:11:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:48,078 INFO L225 Difference]: With dead ends: 1044 [2019-02-18 10:11:48,079 INFO L226 Difference]: Without dead ends: 1041 [2019-02-18 10:11:48,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-02-18 10:11:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2019-02-18 10:11:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 980. [2019-02-18 10:11:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2019-02-18 10:11:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 6702 transitions. [2019-02-18 10:11:48,529 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 6702 transitions. Word has length 6 [2019-02-18 10:11:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:48,529 INFO L480 AbstractCegarLoop]: Abstraction has 980 states and 6702 transitions. [2019-02-18 10:11:48,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:11:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 6702 transitions. [2019-02-18 10:11:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:11:48,530 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:48,531 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:11:48,531 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash 908017958, now seen corresponding path program 1 times [2019-02-18 10:11:48,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:48,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:48,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:11:48,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:48,532 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:48,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:48,627 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:48,627 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:11:48,627 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [27] [2019-02-18 10:11:48,628 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:11:48,628 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:48,988 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:48,988 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:11:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:48,988 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:48,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:48,989 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:11:48,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:48,997 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:49,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:49,176 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-02-18 10:11:49,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:11:49,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:11:49,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:11:49,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,200 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 28 treesize of output 54 [2019-02-18 10:11:49,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,207 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:11:49,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:11:49,221 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,252 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,276 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,296 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,312 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,327 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:11:49,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:11:49,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,435 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,436 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,437 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:11:49,487 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,489 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:11:49,494 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,530 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,546 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,564 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:49,601 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:49,601 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:11:49,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-02-18 10:11:49,713 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:11:49,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:11:49,832 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2019-02-18 10:11:49,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:49,962 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:49,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 93 [2019-02-18 10:11:49,974 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:11:50,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,166 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,170 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:50,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 80 [2019-02-18 10:11:50,172 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:50,265 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 3 xjuncts. [2019-02-18 10:11:50,265 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:135 [2019-02-18 10:11:50,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,388 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,389 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,397 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 95 [2019-02-18 10:11:50,412 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:11:50,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 93 [2019-02-18 10:11:50,609 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:50,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:50,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 86 [2019-02-18 10:11:50,744 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:50,857 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 14 dim-0 vars, and 4 xjuncts. [2019-02-18 10:11:50,857 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:165, output treesize:147 [2019-02-18 10:11:50,998 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-02-18 10:11:51,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,015 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,017 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 102 [2019-02-18 10:11:51,021 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:51,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,169 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:51,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 118 [2019-02-18 10:11:51,190 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2019-02-18 10:11:51,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,483 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,485 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,487 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,497 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:51,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 92 [2019-02-18 10:11:51,498 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:51,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:51,678 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:51,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 98 [2019-02-18 10:11:51,680 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:51,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 4 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-02-18 10:11:51,831 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 21 variables, input treesize:190, output treesize:230 [2019-02-18 10:11:52,078 WARN L181 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 103 [2019-02-18 10:11:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:52,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:52,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:52,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-02-18 10:11:52,204 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:52,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:11:52,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:11:52,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:11:52,205 INFO L87 Difference]: Start difference. First operand 980 states and 6702 transitions. Second operand 12 states. [2019-02-18 10:11:52,402 WARN L181 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-02-18 10:11:52,683 WARN L181 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-02-18 10:11:53,124 WARN L181 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2019-02-18 10:11:53,600 WARN L181 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2019-02-18 10:11:54,166 WARN L181 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 85 [2019-02-18 10:11:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:55,162 INFO L93 Difference]: Finished difference Result 1104 states and 7131 transitions. [2019-02-18 10:11:55,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:11:55,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:11:55,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:55,166 INFO L225 Difference]: With dead ends: 1104 [2019-02-18 10:11:55,166 INFO L226 Difference]: Without dead ends: 1102 [2019-02-18 10:11:55,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2019-02-18 10:11:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2019-02-18 10:11:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 984. [2019-02-18 10:11:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2019-02-18 10:11:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 6730 transitions. [2019-02-18 10:11:55,583 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 6730 transitions. Word has length 6 [2019-02-18 10:11:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:11:55,584 INFO L480 AbstractCegarLoop]: Abstraction has 984 states and 6730 transitions. [2019-02-18 10:11:55,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:11:55,584 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 6730 transitions. [2019-02-18 10:11:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:11:55,585 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:11:55,585 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:11:55,586 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:11:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 908017524, now seen corresponding path program 1 times [2019-02-18 10:11:55,586 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:11:55,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:55,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:55,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:11:55,587 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:11:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:55,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:55,708 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:11:55,709 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:11:55,709 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [27] [2019-02-18 10:11:55,710 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:11:55,710 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:11:56,092 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:11:56,092 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:11:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:11:56,093 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:11:56,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:11:56,093 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:11:56,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:11:56,101 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:11:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:11:56,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:11:56,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:11:56,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,173 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:11:56,218 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,219 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,223 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:11:56,272 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,274 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:11:56,280 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,303 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,328 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,354 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:11:56,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:11:56,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:11:56,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:11:56,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:11:56,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:11:56,407 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,437 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,460 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,477 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,492 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,505 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,542 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:56,542 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:11:56,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:11:56,605 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,637 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:56,637 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-02-18 10:11:56,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,674 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:56,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-02-18 10:11:56,676 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,710 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:56,710 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:42 [2019-02-18 10:11:56,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 10:11:56,748 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,781 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:56,782 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2019-02-18 10:11:56,803 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,813 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:11:56,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:11:56,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2019-02-18 10:11:56,816 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:11:56,853 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:11:56,853 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:34 [2019-02-18 10:11:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:56,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:11:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:11:56,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:11:56,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-02-18 10:11:56,944 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:11:56,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:11:56,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:11:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:11:56,945 INFO L87 Difference]: Start difference. First operand 984 states and 6730 transitions. Second operand 12 states. [2019-02-18 10:11:59,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:11:59,528 INFO L93 Difference]: Finished difference Result 1313 states and 8698 transitions. [2019-02-18 10:11:59,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-02-18 10:11:59,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:11:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:11:59,534 INFO L225 Difference]: With dead ends: 1313 [2019-02-18 10:11:59,534 INFO L226 Difference]: Without dead ends: 1312 [2019-02-18 10:11:59,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-02-18 10:11:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2019-02-18 10:12:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 839. [2019-02-18 10:12:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2019-02-18 10:12:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 5721 transitions. [2019-02-18 10:12:00,183 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 5721 transitions. Word has length 6 [2019-02-18 10:12:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:00,183 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 5721 transitions. [2019-02-18 10:12:00,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:12:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 5721 transitions. [2019-02-18 10:12:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:00,185 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:00,185 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:00,185 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:00,185 INFO L82 PathProgramCache]: Analyzing trace with hash 908550478, now seen corresponding path program 1 times [2019-02-18 10:12:00,185 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:00,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:00,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:00,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:00,186 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:00,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:00,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:00,255 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:12:00,255 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [24], [28], [29] [2019-02-18 10:12:00,256 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:12:00,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:12:00,556 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:12:00,556 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:12:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:00,557 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:12:00,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:00,557 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:00,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:00,565 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:12:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:00,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:00,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:00,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:12:00,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:12:00,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:12:00,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:12:00,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:00,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:12:00,637 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,128 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,150 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,169 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,184 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,199 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:12:01,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:12:01,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:12:01,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,356 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:12:01,422 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,423 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,424 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,427 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,428 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,429 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:12:01,433 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,459 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,486 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,513 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,540 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,588 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:01,589 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-02-18 10:12:01,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-02-18 10:12:01,627 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,675 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:01,676 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-02-18 10:12:01,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 107 [2019-02-18 10:12:01,718 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,767 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:01,768 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:51 [2019-02-18 10:12:01,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,852 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:01,859 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:01,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-02-18 10:12:01,860 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:01,925 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:01,925 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2019-02-18 10:12:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:01,951 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:02,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:02,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:12:02,016 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:02,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:12:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:12:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:12:02,017 INFO L87 Difference]: Start difference. First operand 839 states and 5721 transitions. Second operand 10 states. [2019-02-18 10:12:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:03,015 INFO L93 Difference]: Finished difference Result 881 states and 5780 transitions. [2019-02-18 10:12:03,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:12:03,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:12:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:03,018 INFO L225 Difference]: With dead ends: 881 [2019-02-18 10:12:03,019 INFO L226 Difference]: Without dead ends: 880 [2019-02-18 10:12:03,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:12:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-02-18 10:12:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 841. [2019-02-18 10:12:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2019-02-18 10:12:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 5735 transitions. [2019-02-18 10:12:03,423 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 5735 transitions. Word has length 6 [2019-02-18 10:12:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:03,424 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 5735 transitions. [2019-02-18 10:12:03,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:12:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 5735 transitions. [2019-02-18 10:12:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:03,425 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:03,425 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:03,425 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:03,426 INFO L82 PathProgramCache]: Analyzing trace with hash 908133404, now seen corresponding path program 1 times [2019-02-18 10:12:03,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:03,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:03,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:03,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:03,426 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:03,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:03,509 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:03,509 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:12:03,509 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [28], [29] [2019-02-18 10:12:03,510 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:12:03,510 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:12:03,808 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:12:03,808 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:12:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:03,809 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:12:03,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:03,809 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:03,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:03,817 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:12:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:03,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:03,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:03,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:12:03,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:03,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:03,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:12:03,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:03,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:03,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:03,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:12:03,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:03,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:03,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:03,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:03,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:12:03,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:12:03,884 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:03,915 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:03,938 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:03,954 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:03,968 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:03,983 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:04,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:12:04,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:12:04,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:12:04,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:12:04,118 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:04,135 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:04,150 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:04,167 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:04,200 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:04,200 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-02-18 10:12:04,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-02-18 10:12:04,243 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:04,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:04,273 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-02-18 10:12:04,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2019-02-18 10:12:04,312 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:12:04,431 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:12:04,432 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:72 [2019-02-18 10:12:04,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,478 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:04,479 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:04,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2019-02-18 10:12:04,480 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:04,504 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:04,504 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:27 [2019-02-18 10:12:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:04,524 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:04,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:04,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:12:04,573 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:04,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:12:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:12:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:12:04,574 INFO L87 Difference]: Start difference. First operand 841 states and 5735 transitions. Second operand 10 states. [2019-02-18 10:12:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:05,864 INFO L93 Difference]: Finished difference Result 1415 states and 9444 transitions. [2019-02-18 10:12:05,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:12:05,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:12:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:05,869 INFO L225 Difference]: With dead ends: 1415 [2019-02-18 10:12:05,870 INFO L226 Difference]: Without dead ends: 1413 [2019-02-18 10:12:05,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:12:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2019-02-18 10:12:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1280. [2019-02-18 10:12:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2019-02-18 10:12:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 8838 transitions. [2019-02-18 10:12:06,585 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 8838 transitions. Word has length 6 [2019-02-18 10:12:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:06,585 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 8838 transitions. [2019-02-18 10:12:06,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:12:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 8838 transitions. [2019-02-18 10:12:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:06,588 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:06,589 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:06,589 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash 909988134, now seen corresponding path program 1 times [2019-02-18 10:12:06,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:06,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:06,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:06,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:06,590 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:06,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:06,678 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:06,678 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:12:06,678 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [28], [29] [2019-02-18 10:12:06,679 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:12:06,679 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:12:06,973 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:12:06,973 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:12:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:06,973 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:12:06,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:06,973 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:06,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:06,982 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:12:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:06,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:06,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:12:07,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:12:07,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:12:07,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:12:07,148 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,165 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,182 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,200 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:07,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:12:07,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:12:07,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:12:07,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:12:07,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:12:07,256 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,283 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,304 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,319 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,332 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,344 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:07,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:07,378 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-02-18 10:12:07,588 WARN L181 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-02-18 10:12:07,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:07,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2019-02-18 10:12:07,655 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-02-18 10:12:08,053 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2019-02-18 10:12:08,054 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:425 [2019-02-18 10:12:08,263 WARN L181 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 90 [2019-02-18 10:12:08,269 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,269 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 69 [2019-02-18 10:12:08,272 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:08,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,385 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,387 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:08,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 87 [2019-02-18 10:12:08,397 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-02-18 10:12:08,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,556 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:08,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 93 [2019-02-18 10:12:08,566 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2019-02-18 10:12:08,746 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 12 dim-0 vars, and 5 xjuncts. [2019-02-18 10:12:08,746 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 11 variables, input treesize:194, output treesize:184 [2019-02-18 10:12:08,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 75 [2019-02-18 10:12:08,875 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:08,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,949 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:08,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 69 [2019-02-18 10:12:08,952 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:09,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:09,015 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:09,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:09,017 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:09,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:09,019 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:09,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2019-02-18 10:12:09,020 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:09,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2019-02-18 10:12:09,069 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:132, output treesize:92 [2019-02-18 10:12:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:09,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:09,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:09,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:12:09,200 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:09,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:12:09,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:12:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:12:09,201 INFO L87 Difference]: Start difference. First operand 1280 states and 8838 transitions. Second operand 10 states. [2019-02-18 10:12:09,628 WARN L181 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-02-18 10:12:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:11,156 INFO L93 Difference]: Finished difference Result 1381 states and 9127 transitions. [2019-02-18 10:12:11,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-18 10:12:11,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:12:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:11,161 INFO L225 Difference]: With dead ends: 1381 [2019-02-18 10:12:11,161 INFO L226 Difference]: Without dead ends: 1379 [2019-02-18 10:12:11,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-02-18 10:12:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2019-02-18 10:12:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1274. [2019-02-18 10:12:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2019-02-18 10:12:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2019-02-18 10:12:11,890 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2019-02-18 10:12:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:11,890 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2019-02-18 10:12:11,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:12:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2019-02-18 10:12:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:11,893 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:11,893 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:11,893 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash 909993964, now seen corresponding path program 1 times [2019-02-18 10:12:11,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:11,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:11,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:11,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:11,894 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:12:11,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:11,946 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:11,947 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:12:11,947 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [28], [30], [31] [2019-02-18 10:12:11,948 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:12:11,948 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:12:12,469 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:12:12,469 INFO L272 AbstractInterpreter]: Visited 6 different actions 12 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:12:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:12,470 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:12:12,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:12,470 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:12,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:12,479 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:12:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:12,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:12,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:12:12,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:12:12,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,568 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,572 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:12:12,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:12:12,733 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2019-02-18 10:12:12,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:12,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:12:12,748 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:12,776 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:12,803 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:12,831 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:12,861 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:12,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:12,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:12:12,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:12:12,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:12:12,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:12:12,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:12:12,938 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:12,976 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:12,996 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:13,012 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:13,025 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:13,038 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:13,084 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:13,085 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-02-18 10:12:13,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:13,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-02-18 10:12:13,113 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:13,160 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:13,161 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-02-18 10:12:13,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:13,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:13,187 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:13,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:13,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:13,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:13,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:13,193 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:13,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 112 [2019-02-18 10:12:13,205 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:12:13,365 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-02-18 10:12:13,365 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:110 [2019-02-18 10:12:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:13,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:13,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:13,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:12:13,461 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:13,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:12:13,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:12:13,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:12:13,461 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 8 states. [2019-02-18 10:12:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:17,764 INFO L93 Difference]: Finished difference Result 1306 states and 8833 transitions. [2019-02-18 10:12:17,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:12:17,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-02-18 10:12:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:17,768 INFO L225 Difference]: With dead ends: 1306 [2019-02-18 10:12:17,768 INFO L226 Difference]: Without dead ends: 1305 [2019-02-18 10:12:17,769 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:12:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2019-02-18 10:12:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1274. [2019-02-18 10:12:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2019-02-18 10:12:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2019-02-18 10:12:18,466 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2019-02-18 10:12:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:18,467 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2019-02-18 10:12:18,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:12:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2019-02-18 10:12:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:18,469 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:18,469 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:18,469 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:18,470 INFO L82 PathProgramCache]: Analyzing trace with hash 909980134, now seen corresponding path program 1 times [2019-02-18 10:12:18,470 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:18,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:18,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:18,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:18,470 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:18,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:18,614 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:18,614 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:12:18,615 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [24], [27] [2019-02-18 10:12:18,616 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:12:18,616 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:12:18,970 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:12:18,970 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:12:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:18,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:12:18,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:18,971 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:18,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:18,980 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:12:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:18,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:19,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:12:19,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:12:19,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:12:19,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,178 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,180 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,181 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:12:19,251 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:12:19,261 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,291 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,320 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,350 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,380 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:19,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:12:19,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:12:19,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:12:19,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:12:19,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:12:19,449 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,488 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,511 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,528 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,543 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,556 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:19,606 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-02-18 10:12:19,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:12:19,655 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,703 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:19,703 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-02-18 10:12:19,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,747 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:19,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-02-18 10:12:19,748 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,803 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:19,803 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:59 [2019-02-18 10:12:19,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-02-18 10:12:19,851 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:19,904 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:19,904 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:51 [2019-02-18 10:12:19,933 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,934 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,937 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,939 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,940 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,949 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:19,949 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:19,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2019-02-18 10:12:19,951 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:20,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:20,004 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-02-18 10:12:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:20,034 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:20,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:20,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-02-18 10:12:20,120 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:20,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:12:20,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:12:20,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:12:20,121 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 12 states. [2019-02-18 10:12:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:21,762 INFO L93 Difference]: Finished difference Result 1360 states and 9097 transitions. [2019-02-18 10:12:21,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:12:21,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:12:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:21,768 INFO L225 Difference]: With dead ends: 1360 [2019-02-18 10:12:21,768 INFO L226 Difference]: Without dead ends: 1358 [2019-02-18 10:12:21,769 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2019-02-18 10:12:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2019-02-18 10:12:22,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1309. [2019-02-18 10:12:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2019-02-18 10:12:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 9030 transitions. [2019-02-18 10:12:22,487 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 9030 transitions. Word has length 6 [2019-02-18 10:12:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:22,487 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 9030 transitions. [2019-02-18 10:12:22,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:12:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 9030 transitions. [2019-02-18 10:12:22,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:22,489 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:22,489 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:22,490 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash 896939676, now seen corresponding path program 2 times [2019-02-18 10:12:22,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:22,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:22,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:22,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:22,490 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:12:22,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:22,585 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:22,585 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:12:22,585 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:12:22,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:22,586 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:22,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:12:22,596 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:12:22,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:12:22,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:12:22,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:22,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:12:22,685 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,685 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:12:22,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:12:22,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,800 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:12:22,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:22,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:12:22,879 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:22,909 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,268 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,414 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,445 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:23,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:12:23,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:12:23,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:12:23,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:12:23,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:12:23,500 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,539 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,561 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,578 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,593 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,606 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,656 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:23,657 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-02-18 10:12:23,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:12:23,688 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:23,737 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:12:23,760 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,761 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,762 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,765 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:12:23,769 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,824 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:23,825 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-02-18 10:12:23,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,852 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:23,865 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:23,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-02-18 10:12:23,867 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:23,924 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:23,925 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-02-18 10:12:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:23,948 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:24,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:24,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:12:24,030 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:24,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:12:24,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:12:24,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:12:24,031 INFO L87 Difference]: Start difference. First operand 1309 states and 9030 transitions. Second operand 10 states. [2019-02-18 10:12:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:25,832 INFO L93 Difference]: Finished difference Result 1898 states and 12744 transitions. [2019-02-18 10:12:25,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:12:25,833 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:12:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:25,838 INFO L225 Difference]: With dead ends: 1898 [2019-02-18 10:12:25,838 INFO L226 Difference]: Without dead ends: 1896 [2019-02-18 10:12:25,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:12:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2019-02-18 10:12:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1669. [2019-02-18 10:12:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1669 states. [2019-02-18 10:12:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 11590 transitions. [2019-02-18 10:12:26,896 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 11590 transitions. Word has length 6 [2019-02-18 10:12:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:26,897 INFO L480 AbstractCegarLoop]: Abstraction has 1669 states and 11590 transitions. [2019-02-18 10:12:26,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:12:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 11590 transitions. [2019-02-18 10:12:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:26,901 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:26,901 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:26,901 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash 897602894, now seen corresponding path program 1 times [2019-02-18 10:12:26,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:26,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:26,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:12:26,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:26,902 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:12:26,990 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 10:12:26,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-02-18 10:12:26,990 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 10:12:26,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-02-18 10:12:26,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-02-18 10:12:26,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-02-18 10:12:26,991 INFO L87 Difference]: Start difference. First operand 1669 states and 11590 transitions. Second operand 5 states. [2019-02-18 10:12:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:28,095 INFO L93 Difference]: Finished difference Result 1693 states and 11616 transitions. [2019-02-18 10:12:28,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-18 10:12:28,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-02-18 10:12:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:28,100 INFO L225 Difference]: With dead ends: 1693 [2019-02-18 10:12:28,100 INFO L226 Difference]: Without dead ends: 1692 [2019-02-18 10:12:28,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-02-18 10:12:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2019-02-18 10:12:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1672. [2019-02-18 10:12:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2019-02-18 10:12:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 11593 transitions. [2019-02-18 10:12:29,186 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 11593 transitions. Word has length 6 [2019-02-18 10:12:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:29,187 INFO L480 AbstractCegarLoop]: Abstraction has 1672 states and 11593 transitions. [2019-02-18 10:12:29,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-02-18 10:12:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 11593 transitions. [2019-02-18 10:12:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:29,189 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:29,189 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:29,190 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:29,190 INFO L82 PathProgramCache]: Analyzing trace with hash 900997082, now seen corresponding path program 1 times [2019-02-18 10:12:29,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:29,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:29,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:29,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:29,191 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:29,337 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2019-02-18 10:12:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:29,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:29,349 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:29,349 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:12:29,350 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [28], [30], [31] [2019-02-18 10:12:29,350 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:12:29,351 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:12:29,557 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:12:29,557 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:12:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:29,558 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:12:29,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:29,558 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:29,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:29,566 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:12:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:29,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:29,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:29,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:12:29,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:12:29,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,618 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:12:29,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:12:29,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:12:29,642 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:29,686 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:29,709 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:29,726 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:29,739 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:29,754 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:29,783 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:12:29,803 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:12:29,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,852 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:12:29,903 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,904 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,905 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,907 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,908 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:12:29,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,982 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,983 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:29,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:12:29,985 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:30,012 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:30,038 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:30,065 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:30,094 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:30,142 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:30,142 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2019-02-18 10:12:30,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:30,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-02-18 10:12:30,169 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:30,217 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:30,218 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-02-18 10:12:30,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:30,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:30,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:30,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:30,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:30,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:30,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:30,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:30,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 99 [2019-02-18 10:12:30,251 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:30,300 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:30,301 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:51 [2019-02-18 10:12:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:30,320 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:30,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:30,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:12:30,351 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:30,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:12:30,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:12:30,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:12:30,352 INFO L87 Difference]: Start difference. First operand 1672 states and 11593 transitions. Second operand 8 states. [2019-02-18 10:12:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:32,465 INFO L93 Difference]: Finished difference Result 2759 states and 18997 transitions. [2019-02-18 10:12:32,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:12:32,465 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-02-18 10:12:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:32,473 INFO L225 Difference]: With dead ends: 2759 [2019-02-18 10:12:32,473 INFO L226 Difference]: Without dead ends: 2757 [2019-02-18 10:12:32,474 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:12:32,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2019-02-18 10:12:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2639. [2019-02-18 10:12:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2639 states. [2019-02-18 10:12:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 18434 transitions. [2019-02-18 10:12:34,269 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 18434 transitions. Word has length 6 [2019-02-18 10:12:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:34,269 INFO L480 AbstractCegarLoop]: Abstraction has 2639 states and 18434 transitions. [2019-02-18 10:12:34,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:12:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 18434 transitions. [2019-02-18 10:12:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:34,273 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:34,273 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:34,273 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:34,273 INFO L82 PathProgramCache]: Analyzing trace with hash 900629790, now seen corresponding path program 1 times [2019-02-18 10:12:34,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:34,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:34,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:34,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:34,274 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:34,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:34,411 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:34,411 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-02-18 10:12:34,412 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [27] [2019-02-18 10:12:34,413 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:12:34,413 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:12:34,766 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:12:34,766 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:12:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:34,767 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:12:34,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:34,767 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:34,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:34,775 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:12:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:34,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:34,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:34,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:12:34,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:12:34,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:12:34,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,850 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 30 treesize of output 72 [2019-02-18 10:12:34,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:34,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:12:34,863 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:34,907 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:34,933 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:34,956 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:34,971 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:34,985 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:12:35,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:12:35,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:12:35,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:12:35,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,251 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:12:35,256 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,282 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,362 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,393 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,422 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,472 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:35,472 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:12:35,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:12:35,513 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,561 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:35,562 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:12:35,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,600 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:35,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-02-18 10:12:35,601 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,649 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:35,649 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2019-02-18 10:12:35,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,685 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 10:12:35,688 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,738 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:35,738 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2019-02-18 10:12:35,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,776 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,777 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,782 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,782 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:35,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:35,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-02-18 10:12:35,785 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:35,841 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:35,841 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-02-18 10:12:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:35,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:35,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:35,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-02-18 10:12:35,937 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:35,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:12:35,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:12:35,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:12:35,937 INFO L87 Difference]: Start difference. First operand 2639 states and 18434 transitions. Second operand 12 states. [2019-02-18 10:12:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:39,535 INFO L93 Difference]: Finished difference Result 3636 states and 24951 transitions. [2019-02-18 10:12:39,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-02-18 10:12:39,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-02-18 10:12:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:39,547 INFO L225 Difference]: With dead ends: 3636 [2019-02-18 10:12:39,547 INFO L226 Difference]: Without dead ends: 3626 [2019-02-18 10:12:39,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-02-18 10:12:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2019-02-18 10:12:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 2790. [2019-02-18 10:12:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2019-02-18 10:12:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 19490 transitions. [2019-02-18 10:12:42,240 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 19490 transitions. Word has length 6 [2019-02-18 10:12:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:42,241 INFO L480 AbstractCegarLoop]: Abstraction has 2790 states and 19490 transitions. [2019-02-18 10:12:42,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:12:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 19490 transitions. [2019-02-18 10:12:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-02-18 10:12:42,245 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:42,245 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-02-18 10:12:42,245 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash 900752924, now seen corresponding path program 2 times [2019-02-18 10:12:42,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:42,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:42,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:42,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:42,246 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:42,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:42,302 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:42,302 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:12:42,302 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:12:42,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:42,302 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:42,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:12:42,310 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:12:42,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:12:42,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:12:42,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:42,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:42,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:12:42,337 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,339 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:12:42,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:12:42,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:12:42,364 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,366 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:12:42,372 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,417 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,441 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,459 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,473 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,488 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:12:42,535 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:12:42,578 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:12:42,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:12:42,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:12:42,716 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,743 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,769 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,795 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,824 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,872 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:42,872 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-02-18 10:12:42,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-02-18 10:12:42,900 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:42,947 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:42,947 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-02-18 10:12:42,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:42,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 111 [2019-02-18 10:12:42,992 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:12:43,152 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:12:43,153 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:98 [2019-02-18 10:12:43,220 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,222 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,222 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,223 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,226 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,228 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,229 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:43,229 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:43,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:12:43,230 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:43,271 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:43,272 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:36 [2019-02-18 10:12:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:43,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:43,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:43,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:12:43,334 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:43,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:12:43,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:12:43,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:12:43,335 INFO L87 Difference]: Start difference. First operand 2790 states and 19490 transitions. Second operand 10 states. [2019-02-18 10:12:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:47,463 INFO L93 Difference]: Finished difference Result 4300 states and 29900 transitions. [2019-02-18 10:12:47,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:12:47,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-02-18 10:12:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:47,476 INFO L225 Difference]: With dead ends: 4300 [2019-02-18 10:12:47,477 INFO L226 Difference]: Without dead ends: 4298 [2019-02-18 10:12:47,478 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:12:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2019-02-18 10:12:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4076. [2019-02-18 10:12:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4076 states. [2019-02-18 10:12:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 28660 transitions. [2019-02-18 10:12:51,334 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 28660 transitions. Word has length 6 [2019-02-18 10:12:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:12:51,334 INFO L480 AbstractCegarLoop]: Abstraction has 4076 states and 28660 transitions. [2019-02-18 10:12:51,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:12:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 28660 transitions. [2019-02-18 10:12:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:12:51,340 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:12:51,340 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:12:51,340 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:12:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:51,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2030611754, now seen corresponding path program 1 times [2019-02-18 10:12:51,340 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:12:51,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:51,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:12:51,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:12:51,341 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:12:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:12:51,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:51,414 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:12:51,414 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:12:51,414 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [28], [29] [2019-02-18 10:12:51,415 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:12:51,415 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:12:51,769 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:12:51,769 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:12:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:12:51,769 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:12:51,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:12:51,769 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:12:51,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:12:51,779 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:12:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:12:51,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:12:51,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:12:51,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:12:51,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:12:51,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:12:51,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:12:51,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:51,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:12:51,862 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:51,907 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:51,932 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:51,953 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:51,969 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:51,984 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:12:52,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,077 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:12:52,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:12:52,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,181 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,182 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:12:52,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:12:52,263 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,292 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,320 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,348 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,377 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,426 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:52,427 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-02-18 10:12:52,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:12:52,474 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,520 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:52,520 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-02-18 10:12:52,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:12:52,569 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,623 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:52,623 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-02-18 10:12:52,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,660 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,663 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,671 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:52,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-02-18 10:12:52,672 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:52,729 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-02-18 10:12:52,760 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,761 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,762 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,775 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:12:52,776 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:12:52,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-02-18 10:12:52,778 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:12:52,832 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:12:52,833 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-02-18 10:12:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:52,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:12:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:12:52,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:12:52,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-02-18 10:12:52,943 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:12:52,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-02-18 10:12:52,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-02-18 10:12:52,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:12:52,943 INFO L87 Difference]: Start difference. First operand 4076 states and 28660 transitions. Second operand 11 states. [2019-02-18 10:12:57,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:12:57,386 INFO L93 Difference]: Finished difference Result 4236 states and 29539 transitions. [2019-02-18 10:12:57,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:12:57,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-02-18 10:12:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:12:57,399 INFO L225 Difference]: With dead ends: 4236 [2019-02-18 10:12:57,399 INFO L226 Difference]: Without dead ends: 4233 [2019-02-18 10:12:57,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-02-18 10:12:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2019-02-18 10:13:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 4163. [2019-02-18 10:13:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4163 states. [2019-02-18 10:13:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 29269 transitions. [2019-02-18 10:13:01,054 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 29269 transitions. Word has length 7 [2019-02-18 10:13:01,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:13:01,054 INFO L480 AbstractCegarLoop]: Abstraction has 4163 states and 29269 transitions. [2019-02-18 10:13:01,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-02-18 10:13:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 29269 transitions. [2019-02-18 10:13:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:13:01,060 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:13:01,060 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:13:01,060 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:13:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:01,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2030621364, now seen corresponding path program 1 times [2019-02-18 10:13:01,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:13:01,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:01,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:01,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:01,061 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:13:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:13:01,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:01,162 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:13:01,162 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:13:01,162 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [22], [28], [29] [2019-02-18 10:13:01,163 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:13:01,163 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:13:01,502 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:13:01,502 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:13:01,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:01,503 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:13:01,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:01,503 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:13:01,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:01,511 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:13:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:01,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:13:01,537 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:13:01,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:13:01,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:13:01,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,681 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:01,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:13:01,687 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:01,706 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:01,724 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:01,742 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:01,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:13:01,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:13:01,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:13:01,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:13:01,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:13:01,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:13:01,919 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:01,949 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:01,971 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:01,988 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:02,002 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:02,014 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:02,049 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:02,049 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2019-02-18 10:13:02,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:13:02,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:02,153 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:02,153 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-02-18 10:13:02,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:13:02,191 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:02,228 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:02,228 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2019-02-18 10:13:02,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,267 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,268 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,268 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:13:02,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 94 [2019-02-18 10:13:02,270 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:02,306 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:02,307 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2019-02-18 10:13:02,332 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,333 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,335 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,336 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,337 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,338 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,340 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,341 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:02,344 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:13:02,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-02-18 10:13:02,345 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:02,383 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:02,383 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2019-02-18 10:13:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:02,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:13:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:02,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:13:02,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-02-18 10:13:02,498 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:13:02,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:13:02,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:13:02,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:13:02,499 INFO L87 Difference]: Start difference. First operand 4163 states and 29269 transitions. Second operand 12 states. [2019-02-18 10:13:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:13:06,752 INFO L93 Difference]: Finished difference Result 4232 states and 29577 transitions. [2019-02-18 10:13:06,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:13:06,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-02-18 10:13:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:13:06,766 INFO L225 Difference]: With dead ends: 4232 [2019-02-18 10:13:06,766 INFO L226 Difference]: Without dead ends: 4231 [2019-02-18 10:13:06,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2019-02-18 10:13:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2019-02-18 10:13:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 4190. [2019-02-18 10:13:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4190 states. [2019-02-18 10:13:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 29458 transitions. [2019-02-18 10:13:10,444 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 29458 transitions. Word has length 7 [2019-02-18 10:13:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:13:10,444 INFO L480 AbstractCegarLoop]: Abstraction has 4190 states and 29458 transitions. [2019-02-18 10:13:10,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:13:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 29458 transitions. [2019-02-18 10:13:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:13:10,450 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:13:10,451 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:13:10,451 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:13:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2030548264, now seen corresponding path program 1 times [2019-02-18 10:13:10,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:13:10,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:10,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:10,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:10,452 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:13:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:10,624 WARN L181 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-02-18 10:13:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:13:10,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:10,676 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:13:10,676 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:13:10,676 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [30], [31] [2019-02-18 10:13:10,677 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:13:10,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:13:11,053 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:13:11,054 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:13:11,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:11,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:13:11,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:11,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:13:11,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:11,063 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:13:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:11,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:13:11,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:13:11,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:13:11,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:13:11,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,211 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,215 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,217 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,220 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:13:11,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:13:11,300 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,330 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,360 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,390 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,426 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:13:11,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:13:11,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:13:11,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:13:11,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:13:11,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:13:11,555 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,590 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,611 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,627 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,639 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,652 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,699 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:11,700 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-02-18 10:13:11,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-02-18 10:13:11,738 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:11,782 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:11,782 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-02-18 10:13:11,818 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:11,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:13:11,836 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:13:11,997 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:13:11,997 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:98 [2019-02-18 10:13:12,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,070 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:13:12,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:12,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-02-18 10:13:12,073 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:12,112 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:12,112 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-02-18 10:13:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:12,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:13:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:12,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:13:12,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:13:12,189 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:13:12,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:13:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:13:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:13:12,189 INFO L87 Difference]: Start difference. First operand 4190 states and 29458 transitions. Second operand 10 states. [2019-02-18 10:13:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:13:16,443 INFO L93 Difference]: Finished difference Result 4570 states and 31903 transitions. [2019-02-18 10:13:16,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:13:16,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-02-18 10:13:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:13:16,458 INFO L225 Difference]: With dead ends: 4570 [2019-02-18 10:13:16,458 INFO L226 Difference]: Without dead ends: 4569 [2019-02-18 10:13:16,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:13:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2019-02-18 10:13:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4419. [2019-02-18 10:13:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4419 states. [2019-02-18 10:13:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 31072 transitions. [2019-02-18 10:13:20,315 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 31072 transitions. Word has length 7 [2019-02-18 10:13:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:13:20,315 INFO L480 AbstractCegarLoop]: Abstraction has 4419 states and 31072 transitions. [2019-02-18 10:13:20,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:13:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 31072 transitions. [2019-02-18 10:13:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:13:20,321 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:13:20,322 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:13:20,322 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:13:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:20,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2030561782, now seen corresponding path program 1 times [2019-02-18 10:13:20,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:13:20,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:20,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:20,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:20,323 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:13:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:13:20,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:20,570 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:13:20,570 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:13:20,570 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [28], [29] [2019-02-18 10:13:20,571 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:13:20,571 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:13:21,297 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:13:21,298 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:13:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:21,298 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:13:21,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:21,298 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:13:21,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:21,317 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:13:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:21,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:13:21,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:13:21,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:13:21,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,371 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:13:21,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:13:21,387 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,388 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,389 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:13:21,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,397 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:13:21,401 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,446 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,470 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,490 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,504 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,518 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:13:21,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:13:21,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:13:21,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,701 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:13:21,776 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,777 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,779 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,782 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:13:21,785 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,813 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,841 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,868 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,896 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:21,946 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:21,947 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-02-18 10:13:21,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:21,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:13:21,995 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:22,378 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:22,379 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-02-18 10:13:22,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,420 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,421 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:13:22,423 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:22,477 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:22,477 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-02-18 10:13:22,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,518 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,521 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,522 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:13:22,523 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-02-18 10:13:22,525 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:22,579 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:22,579 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-02-18 10:13:22,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,612 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,613 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,618 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,620 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:22,630 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:13:22,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 131 [2019-02-18 10:13:22,632 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:22,689 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:22,689 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2019-02-18 10:13:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:22,720 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:13:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:22,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:13:22,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-02-18 10:13:22,823 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:13:22,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:13:22,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:13:22,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:13:22,823 INFO L87 Difference]: Start difference. First operand 4419 states and 31072 transitions. Second operand 12 states. [2019-02-18 10:13:28,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:13:28,993 INFO L93 Difference]: Finished difference Result 5928 states and 41521 transitions. [2019-02-18 10:13:28,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:13:28,994 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-02-18 10:13:28,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:13:29,012 INFO L225 Difference]: With dead ends: 5928 [2019-02-18 10:13:29,012 INFO L226 Difference]: Without dead ends: 5927 [2019-02-18 10:13:29,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2019-02-18 10:13:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2019-02-18 10:13:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 5628. [2019-02-18 10:13:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5628 states. [2019-02-18 10:13:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 39710 transitions. [2019-02-18 10:13:34,351 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 39710 transitions. Word has length 7 [2019-02-18 10:13:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:13:34,351 INFO L480 AbstractCegarLoop]: Abstraction has 5628 states and 39710 transitions. [2019-02-18 10:13:34,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:13:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 39710 transitions. [2019-02-18 10:13:34,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:13:34,358 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:13:34,358 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:13:34,358 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:13:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:34,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2030965338, now seen corresponding path program 1 times [2019-02-18 10:13:34,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:13:34,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:34,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:34,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:34,360 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:13:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:13:34,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:34,520 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:13:34,520 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:13:34,520 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [30], [31] [2019-02-18 10:13:34,521 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:13:34,521 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:13:34,794 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:13:34,794 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:13:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:34,794 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:13:34,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:34,794 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:13:34,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:34,803 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:13:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:34,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:13:34,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:13:34,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:13:34,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:34,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:34,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:13:34,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:34,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:34,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:34,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:13:34,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:34,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:34,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:34,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:34,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:13:34,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:13:34,874 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:34,904 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:34,927 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:34,944 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:34,958 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:34,972 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:34,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:13:35,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:13:35,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:13:35,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:13:35,102 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:35,119 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:35,134 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:35,152 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:35,185 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:35,185 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2019-02-18 10:13:35,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-02-18 10:13:35,240 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:35,267 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:35,267 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2019-02-18 10:13:35,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2019-02-18 10:13:35,315 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:13:35,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:13:35,422 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:68 [2019-02-18 10:13:35,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,476 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:13:35,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 101 [2019-02-18 10:13:35,477 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:35,540 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,541 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,542 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,545 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:35,550 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:13:35,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 73 [2019-02-18 10:13:35,551 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:35,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:13:35,598 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:88, output treesize:70 [2019-02-18 10:13:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:35,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:13:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:35,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:13:35,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2019-02-18 10:13:35,709 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:13:35,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-02-18 10:13:35,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-02-18 10:13:35,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:13:35,710 INFO L87 Difference]: Start difference. First operand 5628 states and 39710 transitions. Second operand 11 states. [2019-02-18 10:13:35,980 WARN L181 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2019-02-18 10:13:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:13:42,945 INFO L93 Difference]: Finished difference Result 6511 states and 45570 transitions. [2019-02-18 10:13:42,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-18 10:13:42,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-02-18 10:13:42,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:13:42,967 INFO L225 Difference]: With dead ends: 6511 [2019-02-18 10:13:42,967 INFO L226 Difference]: Without dead ends: 6510 [2019-02-18 10:13:42,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-02-18 10:13:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2019-02-18 10:13:49,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 6405. [2019-02-18 10:13:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6405 states. [2019-02-18 10:13:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 45149 transitions. [2019-02-18 10:13:49,947 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 45149 transitions. Word has length 7 [2019-02-18 10:13:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:13:49,948 INFO L480 AbstractCegarLoop]: Abstraction has 6405 states and 45149 transitions. [2019-02-18 10:13:49,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-02-18 10:13:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 45149 transitions. [2019-02-18 10:13:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:13:49,956 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:13:49,957 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:13:49,957 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:13:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2015785446, now seen corresponding path program 1 times [2019-02-18 10:13:49,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:13:49,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:49,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:49,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:13:49,958 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:13:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:50,098 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-02-18 10:13:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:50,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:50,312 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:13:50,312 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:13:50,313 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [28], [29] [2019-02-18 10:13:50,313 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:13:50,313 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:13:50,693 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:13:50,693 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:13:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:13:50,694 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:13:50,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:13:50,694 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:13:50,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:13:50,703 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:13:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:13:50,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:13:50,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:13:50,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:13:50,787 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,790 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,791 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:13:50,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:13:50,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,924 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,926 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:50,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:13:50,927 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:50,956 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:50,983 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,011 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,041 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:13:51,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:13:51,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:13:51,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:13:51,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:13:51,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:13:51,103 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,141 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,162 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,176 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,189 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,202 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,250 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:51,250 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:84, output treesize:87 [2019-02-18 10:13:51,333 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-02-18 10:13:51,335 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,365 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:51,365 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-02-18 10:13:51,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-02-18 10:13:51,413 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,448 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:51,448 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2019-02-18 10:13:51,485 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,487 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,489 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,493 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:13:51,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2019-02-18 10:13:51,495 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,533 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:51,533 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2019-02-18 10:13:51,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,568 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,572 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,575 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,576 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,578 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,580 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:13:51,580 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:13:51,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2019-02-18 10:13:51,581 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:13:51,619 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:13:51,619 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2019-02-18 10:13:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:51,647 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:13:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:13:51,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:13:51,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2019-02-18 10:13:51,743 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:13:51,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-02-18 10:13:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-02-18 10:13:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:13:51,744 INFO L87 Difference]: Start difference. First operand 6405 states and 45149 transitions. Second operand 13 states. [2019-02-18 10:13:51,871 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-02-18 10:13:52,001 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2019-02-18 10:13:52,266 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-02-18 10:13:52,660 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2019-02-18 10:14:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:14:01,031 INFO L93 Difference]: Finished difference Result 7179 states and 50083 transitions. [2019-02-18 10:14:01,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-02-18 10:14:01,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-02-18 10:14:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:14:01,058 INFO L225 Difference]: With dead ends: 7179 [2019-02-18 10:14:01,058 INFO L226 Difference]: Without dead ends: 7170 [2019-02-18 10:14:01,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2019-02-18 10:14:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2019-02-18 10:14:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 6542. [2019-02-18 10:14:08,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6542 states. [2019-02-18 10:14:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 46140 transitions. [2019-02-18 10:14:08,066 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 46140 transitions. Word has length 7 [2019-02-18 10:14:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:14:08,066 INFO L480 AbstractCegarLoop]: Abstraction has 6542 states and 46140 transitions. [2019-02-18 10:14:08,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-02-18 10:14:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 46140 transitions. [2019-02-18 10:14:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:14:08,074 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:14:08,074 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:14:08,074 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:14:08,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:14:08,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2015650778, now seen corresponding path program 1 times [2019-02-18 10:14:08,074 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:14:08,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:14:08,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:14:08,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:14:08,075 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:14:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:14:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:14:08,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:14:08,131 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:14:08,131 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:14:08,131 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [30], [32], [33] [2019-02-18 10:14:08,132 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:14:08,132 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:14:08,351 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:14:08,351 INFO L272 AbstractInterpreter]: Visited 7 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:14:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:14:08,351 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:14:08,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:14:08,352 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:14:08,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:14:08,360 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:14:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:14:08,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:14:08,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2019-02-18 10:14:08,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-02-18 10:14:08,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2019-02-18 10:14:08,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 56 [2019-02-18 10:14:08,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,479 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,485 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2019-02-18 10:14:08,487 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,505 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,523 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,542 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,560 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:14:08,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:14:08,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-18 10:14:08,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-18 10:14:08,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 48 [2019-02-18 10:14:08,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:14:08,626 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,653 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,666 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,679 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,692 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,703 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:08,737 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:08,738 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:59, output treesize:67 [2019-02-18 10:14:08,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:08,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 79 [2019-02-18 10:14:08,796 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-02-18 10:14:09,102 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 20 dim-0 vars, and 8 xjuncts. [2019-02-18 10:14:09,102 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:333 [2019-02-18 10:14:09,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:09,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:09,166 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:09,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:09,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 42 [2019-02-18 10:14:09,168 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:09,183 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:09,183 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:18 [2019-02-18 10:14:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:14:09,198 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:14:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:14:09,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:14:09,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 10:14:09,229 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:14:09,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:14:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:14:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:14:09,230 INFO L87 Difference]: Start difference. First operand 6542 states and 46140 transitions. Second operand 8 states. [2019-02-18 10:14:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:14:19,487 INFO L93 Difference]: Finished difference Result 10441 states and 73753 transitions. [2019-02-18 10:14:19,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:14:19,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-02-18 10:14:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:14:19,530 INFO L225 Difference]: With dead ends: 10441 [2019-02-18 10:14:19,530 INFO L226 Difference]: Without dead ends: 10440 [2019-02-18 10:14:19,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:14:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2019-02-18 10:14:30,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 10397. [2019-02-18 10:14:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10397 states. [2019-02-18 10:14:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10397 states to 10397 states and 73709 transitions. [2019-02-18 10:14:30,253 INFO L78 Accepts]: Start accepts. Automaton has 10397 states and 73709 transitions. Word has length 7 [2019-02-18 10:14:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:14:30,253 INFO L480 AbstractCegarLoop]: Abstraction has 10397 states and 73709 transitions. [2019-02-18 10:14:30,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:14:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10397 states and 73709 transitions. [2019-02-18 10:14:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:14:30,264 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:14:30,264 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:14:30,264 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:14:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:14:30,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2014341960, now seen corresponding path program 1 times [2019-02-18 10:14:30,264 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:14:30,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:14:30,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:14:30,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:14:30,265 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:14:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:14:30,472 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2019-02-18 10:14:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:14:30,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:14:30,513 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:14:30,513 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:14:30,513 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [28], [30], [31] [2019-02-18 10:14:30,514 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:14:30,514 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:14:30,817 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:14:30,817 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:14:30,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:14:30,817 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:14:30,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:14:30,818 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:14:30,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:14:30,826 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:14:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:14:30,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:14:30,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:14:30,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:14:30,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:14:30,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:14:30,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,879 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,882 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:14:30,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,892 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,893 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:30,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:14:30,896 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:30,938 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:30,961 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:30,980 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:30,995 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:31,010 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:31,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:14:31,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:14:31,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:14:31,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:14:31,229 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,234 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,236 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,237 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:14:31,240 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:31,267 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:31,294 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:31,320 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:31,347 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:31,394 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:31,395 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-02-18 10:14:31,431 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-02-18 10:14:31,432 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:31,477 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:31,478 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-02-18 10:14:31,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,507 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,509 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,510 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,513 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:14:31,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2019-02-18 10:14:31,515 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:31,562 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:31,562 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:55 [2019-02-18 10:14:31,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:31,606 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:14:31,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 108 [2019-02-18 10:14:31,617 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:14:31,770 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-02-18 10:14:31,771 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:102 [2019-02-18 10:14:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:14:31,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:14:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:14:31,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:14:31,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:14:31,881 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:14:31,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:14:31,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:14:31,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:14:31,882 INFO L87 Difference]: Start difference. First operand 10397 states and 73709 transitions. Second operand 10 states. [2019-02-18 10:14:42,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:14:42,470 INFO L93 Difference]: Finished difference Result 10427 states and 73743 transitions. [2019-02-18 10:14:42,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 10:14:42,471 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-02-18 10:14:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:14:42,512 INFO L225 Difference]: With dead ends: 10427 [2019-02-18 10:14:42,512 INFO L226 Difference]: Without dead ends: 10426 [2019-02-18 10:14:42,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:14:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10426 states. [2019-02-18 10:14:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10426 to 10394. [2019-02-18 10:14:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10394 states. [2019-02-18 10:14:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10394 states to 10394 states and 73688 transitions. [2019-02-18 10:14:53,404 INFO L78 Accepts]: Start accepts. Automaton has 10394 states and 73688 transitions. Word has length 7 [2019-02-18 10:14:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:14:53,404 INFO L480 AbstractCegarLoop]: Abstraction has 10394 states and 73688 transitions. [2019-02-18 10:14:53,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:14:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 10394 states and 73688 transitions. [2019-02-18 10:14:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:14:53,415 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:14:53,416 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:14:53,416 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:14:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:14:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2026927280, now seen corresponding path program 1 times [2019-02-18 10:14:53,416 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:14:53,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:14:53,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:14:53,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:14:53,417 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:14:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:14:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:14:53,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:14:53,533 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:14:53,533 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:14:53,533 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [28], [29] [2019-02-18 10:14:53,534 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:14:53,534 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:14:54,839 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:14:54,839 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:14:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:14:54,839 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:14:54,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:14:54,839 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:14:54,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:14:54,849 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:14:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:14:54,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:14:54,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:14:54,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:14:54,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:54,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:54,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:14:54,880 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:54,882 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:54,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:54,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:14:54,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:54,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:54,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:54,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:54,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:14:54,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:14:54,918 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:54,947 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:54,970 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:54,988 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,000 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,014 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:14:55,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:14:55,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:14:55,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:14:55,147 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,164 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,180 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,197 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,231 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:55,231 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2019-02-18 10:14:55,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2019-02-18 10:14:55,286 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,305 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:55,305 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2019-02-18 10:14:55,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,330 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,332 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:14:55,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 60 [2019-02-18 10:14:55,333 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:55,354 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:29 [2019-02-18 10:14:55,375 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 61 [2019-02-18 10:14:55,383 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:55,402 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:29 [2019-02-18 10:14:55,425 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,427 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,428 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,429 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,430 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,433 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,435 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:14:55,436 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:14:55,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 75 [2019-02-18 10:14:55,437 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:14:55,461 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:14:55,461 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:33 [2019-02-18 10:14:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:14:55,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:14:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:14:55,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:14:55,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-02-18 10:14:55,563 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:14:55,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:14:55,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:14:55,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:14:55,564 INFO L87 Difference]: Start difference. First operand 10394 states and 73688 transitions. Second operand 12 states. [2019-02-18 10:15:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:15:06,828 INFO L93 Difference]: Finished difference Result 11408 states and 80747 transitions. [2019-02-18 10:15:06,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-18 10:15:06,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-02-18 10:15:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:15:06,874 INFO L225 Difference]: With dead ends: 11408 [2019-02-18 10:15:06,874 INFO L226 Difference]: Without dead ends: 11406 [2019-02-18 10:15:06,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-02-18 10:15:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11406 states. [2019-02-18 10:15:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11406 to 11270. [2019-02-18 10:15:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11270 states. [2019-02-18 10:15:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 80138 transitions. [2019-02-18 10:15:18,260 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 80138 transitions. Word has length 7 [2019-02-18 10:15:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:15:18,260 INFO L480 AbstractCegarLoop]: Abstraction has 11270 states and 80138 transitions. [2019-02-18 10:15:18,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:15:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 80138 transitions. [2019-02-18 10:15:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:15:18,272 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:15:18,272 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-02-18 10:15:18,272 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:15:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:15:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2023700554, now seen corresponding path program 2 times [2019-02-18 10:15:18,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:15:18,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:15:18,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:15:18,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:15:18,273 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:15:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:15:18,455 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2019-02-18 10:15:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:15:18,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:15:18,551 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:15:18,551 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:15:18,551 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:15:18,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:15:18,552 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:15:18,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:15:18,561 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:15:18,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-02-18 10:15:18,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:15:18,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:15:18,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:15:18,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:15:18,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:15:18,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:15:18,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:15:18,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,782 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,785 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:15:18,786 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:18,832 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:18,858 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:18,875 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:18,891 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:18,903 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:18,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:15:18,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:18,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:15:19,029 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,031 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,032 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:15:19,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:15:19,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:15:19,176 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,203 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,232 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,260 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,289 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,340 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:19,341 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:15:19,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-02-18 10:15:19,381 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,429 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:19,429 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-02-18 10:15:19,460 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-02-18 10:15:19,470 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,523 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:19,523 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-02-18 10:15:19,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,568 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:15:19,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-02-18 10:15:19,569 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,627 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:19,628 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:49 [2019-02-18 10:15:19,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,742 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:15:19,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-02-18 10:15:19,745 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,802 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:19,802 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:43 [2019-02-18 10:15:19,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,842 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:19,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2019-02-18 10:15:19,855 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:19,913 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:19,914 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:41 [2019-02-18 10:15:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:15:19,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:15:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:15:20,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:15:20,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2019-02-18 10:15:20,042 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:15:20,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-02-18 10:15:20,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-02-18 10:15:20,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2019-02-18 10:15:20,043 INFO L87 Difference]: Start difference. First operand 11270 states and 80138 transitions. Second operand 13 states. [2019-02-18 10:15:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:15:35,710 INFO L93 Difference]: Finished difference Result 14692 states and 103813 transitions. [2019-02-18 10:15:35,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-02-18 10:15:35,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-02-18 10:15:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:15:35,771 INFO L225 Difference]: With dead ends: 14692 [2019-02-18 10:15:35,772 INFO L226 Difference]: Without dead ends: 14688 [2019-02-18 10:15:35,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-02-18 10:15:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14688 states. [2019-02-18 10:15:48,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14688 to 12758. [2019-02-18 10:15:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12758 states. [2019-02-18 10:15:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12758 states to 12758 states and 90546 transitions. [2019-02-18 10:15:48,914 INFO L78 Accepts]: Start accepts. Automaton has 12758 states and 90546 transitions. Word has length 7 [2019-02-18 10:15:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:15:48,914 INFO L480 AbstractCegarLoop]: Abstraction has 12758 states and 90546 transitions. [2019-02-18 10:15:48,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-02-18 10:15:48,914 INFO L276 IsEmpty]: Start isEmpty. Operand 12758 states and 90546 transitions. [2019-02-18 10:15:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:15:48,926 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:15:48,926 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:15:48,926 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:15:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:15:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2023160096, now seen corresponding path program 1 times [2019-02-18 10:15:48,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:15:48,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:15:48,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:15:48,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:15:48,927 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:15:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:15:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:15:48,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:15:48,979 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:15:48,979 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:15:48,980 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [28], [30], [31] [2019-02-18 10:15:48,980 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:15:48,980 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:15:49,273 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:15:49,273 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:15:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:15:49,273 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:15:49,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:15:49,274 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:15:49,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:15:49,282 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:15:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:15:49,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:15:49,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:15:49,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:15:49,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,325 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:15:49,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,332 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,333 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:15:49,338 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,341 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:15:49,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:15:49,357 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,396 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,418 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,437 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,451 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,464 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:15:49,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:15:49,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:15:49,610 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,612 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,614 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:15:49,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,681 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,685 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:15:49,690 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,717 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,743 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,769 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,798 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:49,846 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-02-18 10:15:49,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-02-18 10:15:49,879 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:49,924 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:49,924 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-02-18 10:15:49,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:49,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 109 [2019-02-18 10:15:49,962 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:50,009 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:50,010 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-02-18 10:15:50,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,108 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,109 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:15:50,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:15:50,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-02-18 10:15:50,112 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:15:50,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:15:50,164 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2019-02-18 10:15:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:15:50,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:15:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:15:50,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:15:50,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 10:15:50,242 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:15:50,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:15:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:15:50,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:15:50,243 INFO L87 Difference]: Start difference. First operand 12758 states and 90546 transitions. Second operand 10 states. [2019-02-18 10:16:03,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:16:03,402 INFO L93 Difference]: Finished difference Result 13016 states and 92075 transitions. [2019-02-18 10:16:03,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:16:03,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-02-18 10:16:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:16:03,448 INFO L225 Difference]: With dead ends: 13016 [2019-02-18 10:16:03,449 INFO L226 Difference]: Without dead ends: 13015 [2019-02-18 10:16:03,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:16:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13015 states. [2019-02-18 10:16:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13015 to 12958. [2019-02-18 10:16:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2019-02-18 10:16:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2019-02-18 10:16:16,700 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2019-02-18 10:16:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:16:16,700 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2019-02-18 10:16:16,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:16:16,701 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2019-02-18 10:16:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:16:16,713 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:16:16,713 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-02-18 10:16:16,713 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:16:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:16:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1920990370, now seen corresponding path program 1 times [2019-02-18 10:16:16,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:16:16,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:16:16,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:16:16,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:16:16,715 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:16:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:16:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:16:16,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:16:16,788 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:16:16,789 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:16:16,789 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [30], [32], [33] [2019-02-18 10:16:16,790 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:16:16,790 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:16:16,944 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:16:16,944 INFO L272 AbstractInterpreter]: Visited 6 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 10:16:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:16:16,945 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:16:16,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:16:16,945 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:16:16,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:16:16,956 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:16:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:16:16,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:16:16,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:16:16,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:16:16,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:16,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:16,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:16:16,993 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:16,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:16,997 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:16,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:16:17,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:16:17,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:16:17,022 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,051 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,074 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,091 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,106 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,120 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:16:17,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:16:17,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:16:17,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:16:17,253 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,269 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,285 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,302 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:17,335 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:16:17,336 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-02-18 10:16:17,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:17,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:16:17,378 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:16:17,481 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:16:17,481 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-02-18 10:16:19,644 WARN L181 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2019-02-18 10:16:19,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:19,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:19,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:19,651 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:19,652 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:19,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:19,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:16:19,655 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:16:19,678 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:16:19,678 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:33 [2019-02-18 10:16:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:16:19,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:16:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:16:19,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:16:19,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-02-18 10:16:19,732 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:16:19,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-02-18 10:16:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-02-18 10:16:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-02-18 10:16:19,732 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 7 states. [2019-02-18 10:16:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:16:32,217 INFO L93 Difference]: Finished difference Result 12974 states and 91967 transitions. [2019-02-18 10:16:32,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:16:32,218 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-02-18 10:16:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:16:32,264 INFO L225 Difference]: With dead ends: 12974 [2019-02-18 10:16:32,264 INFO L226 Difference]: Without dead ends: 12973 [2019-02-18 10:16:32,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:16:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12973 states. [2019-02-18 10:16:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12973 to 12958. [2019-02-18 10:16:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2019-02-18 10:16:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2019-02-18 10:16:46,198 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2019-02-18 10:16:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:16:46,198 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2019-02-18 10:16:46,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-02-18 10:16:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2019-02-18 10:16:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:16:46,209 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:16:46,209 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:16:46,209 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:16:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:16:46,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1935645556, now seen corresponding path program 1 times [2019-02-18 10:16:46,210 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:16:46,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:16:46,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:16:46,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:16:46,210 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:16:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:16:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:16:46,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:16:46,294 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:16:46,295 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:16:46,295 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [30], [31] [2019-02-18 10:16:46,296 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:16:46,296 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:16:46,673 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:16:46,674 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:16:46,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:16:46,674 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:16:46,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:16:46,674 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:16:46,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:16:46,682 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:16:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:16:46,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:16:46,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:16:46,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:16:46,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:16:46,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:16:46,723 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,725 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:16:46,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:16:46,744 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:16:46,789 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:46,813 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:46,831 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:46,846 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:46,861 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:46,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:16:46,909 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,911 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:16:46,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:46,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:16:47,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,015 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:16:47,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,089 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:16:47,096 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:16:47,121 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:47,147 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:47,174 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:47,203 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:16:47,251 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:16:47,251 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-02-18 10:16:47,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:16:47,299 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:16:47,465 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:16:47,466 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2019-02-18 10:16:47,528 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,529 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,529 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:16:47,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:16:47,530 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:16:47,570 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:16:47,570 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2019-02-18 10:16:47,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:16:47,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 10:16:47,603 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:16:47,640 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:16:47,640 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2019-02-18 10:16:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:16:47,662 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:16:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:16:47,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:16:47,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:16:47,718 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:16:47,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:16:47,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:16:47,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:16:47,719 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 10 states. [2019-02-18 10:17:00,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:17:00,688 INFO L93 Difference]: Finished difference Result 13106 states and 92752 transitions. [2019-02-18 10:17:00,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-02-18 10:17:00,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-02-18 10:17:00,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:17:00,738 INFO L225 Difference]: With dead ends: 13106 [2019-02-18 10:17:00,738 INFO L226 Difference]: Without dead ends: 13105 [2019-02-18 10:17:00,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-02-18 10:17:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13105 states. [2019-02-18 10:17:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13105 to 13023. [2019-02-18 10:17:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13023 states. [2019-02-18 10:17:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13023 states to 13023 states and 92401 transitions. [2019-02-18 10:17:13,982 INFO L78 Accepts]: Start accepts. Automaton has 13023 states and 92401 transitions. Word has length 7 [2019-02-18 10:17:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:17:13,982 INFO L480 AbstractCegarLoop]: Abstraction has 13023 states and 92401 transitions. [2019-02-18 10:17:13,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:17:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 13023 states and 92401 transitions. [2019-02-18 10:17:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:17:13,993 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:17:13,993 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:17:13,994 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:17:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:17:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1935632038, now seen corresponding path program 1 times [2019-02-18 10:17:13,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:17:13,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:17:13,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:17:13,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:17:13,995 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:17:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:17:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:17:14,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:17:14,083 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:17:14,083 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:17:14,083 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [24], [28], [29] [2019-02-18 10:17:14,084 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:17:14,084 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:17:14,443 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:17:14,443 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:17:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:17:14,443 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:17:14,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:17:14,444 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:17:14,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:17:14,453 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:17:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:17:14,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:17:14,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:17:14,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:17:14,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:17:14,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:17:14,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:17:14,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,521 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,523 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:17:14,526 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:14,573 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:14,597 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:14,617 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:14,633 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:14,648 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:14,685 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:17:14,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:17:14,777 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:17:14,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:17:14,913 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:14,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:17:14,923 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:14,952 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:14,980 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:15,008 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:15,037 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:15,087 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:15,087 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-02-18 10:17:15,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:17:15,136 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:15,185 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:15,185 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-02-18 10:17:15,227 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,227 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,229 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,230 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,234 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,234 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:17:15,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-02-18 10:17:15,236 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:15,285 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:15,285 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2019-02-18 10:17:15,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,372 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,375 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-02-18 10:17:15,379 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:15,432 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:15,432 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2019-02-18 10:17:15,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,478 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,479 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:15,480 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:17:15,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-02-18 10:17:15,482 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:15,538 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:15,538 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2019-02-18 10:17:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:17:17,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:17:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:17:17,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:17:17,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-02-18 10:17:17,389 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:17:17,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-02-18 10:17:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-02-18 10:17:17,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:17:17,390 INFO L87 Difference]: Start difference. First operand 13023 states and 92401 transitions. Second operand 12 states. [2019-02-18 10:17:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:17:41,061 INFO L93 Difference]: Finished difference Result 13278 states and 93926 transitions. [2019-02-18 10:17:41,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 10:17:41,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-02-18 10:17:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:17:41,111 INFO L225 Difference]: With dead ends: 13278 [2019-02-18 10:17:41,111 INFO L226 Difference]: Without dead ends: 13277 [2019-02-18 10:17:41,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2019-02-18 10:17:41,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2019-02-18 10:17:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13233. [2019-02-18 10:17:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13233 states. [2019-02-18 10:17:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13233 states to 13233 states and 93871 transitions. [2019-02-18 10:17:55,298 INFO L78 Accepts]: Start accepts. Automaton has 13233 states and 93871 transitions. Word has length 7 [2019-02-18 10:17:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:17:55,299 INFO L480 AbstractCegarLoop]: Abstraction has 13233 states and 93871 transitions. [2019-02-18 10:17:55,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-02-18 10:17:55,299 INFO L276 IsEmpty]: Start isEmpty. Operand 13233 states and 93871 transitions. [2019-02-18 10:17:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:17:55,310 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:17:55,310 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:17:55,310 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:17:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:17:55,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1935214964, now seen corresponding path program 1 times [2019-02-18 10:17:55,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:17:55,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:17:55,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:17:55,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:17:55,311 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:17:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:17:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:17:55,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:17:55,505 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:17:55,505 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:17:55,505 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [22], [28], [29] [2019-02-18 10:17:55,506 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:17:55,506 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:17:55,865 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:17:55,865 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-02-18 10:17:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:17:55,866 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:17:55,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:17:55,866 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:17:55,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:17:55,875 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:17:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:17:55,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:17:55,994 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-02-18 10:17:55,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:17:55,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:17:56,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:17:56,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:17:56,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:17:56,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:17:56,030 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,063 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,087 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,107 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,122 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,134 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:17:56,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:17:56,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:17:56,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:17:56,302 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,320 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,336 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,354 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,390 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:56,390 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:17:56,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:17:56,452 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,485 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:56,485 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-02-18 10:17:56,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,518 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,520 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:17:56,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-02-18 10:17:56,521 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,554 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:56,555 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2019-02-18 10:17:56,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,586 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-02-18 10:17:56,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,628 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:56,629 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2019-02-18 10:17:56,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,660 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,663 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:17:56,668 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:17:56,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-02-18 10:17:56,669 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:17:56,707 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:17:56,708 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2019-02-18 10:17:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:17:56,733 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:17:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:17:56,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:17:56,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2019-02-18 10:17:56,808 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:17:56,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-02-18 10:17:56,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-02-18 10:17:56,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:17:56,809 INFO L87 Difference]: Start difference. First operand 13233 states and 93871 transitions. Second operand 13 states. [2019-02-18 10:18:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:18:13,597 INFO L93 Difference]: Finished difference Result 17581 states and 124519 transitions. [2019-02-18 10:18:13,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-02-18 10:18:13,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-02-18 10:18:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:18:13,665 INFO L225 Difference]: With dead ends: 17581 [2019-02-18 10:18:13,665 INFO L226 Difference]: Without dead ends: 17580 [2019-02-18 10:18:13,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2019-02-18 10:18:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17580 states. [2019-02-18 10:18:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17580 to 9927. [2019-02-18 10:18:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2019-02-18 10:18:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2019-02-18 10:18:24,424 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2019-02-18 10:18:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:18:24,424 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2019-02-18 10:18:24,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-02-18 10:18:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2019-02-18 10:18:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:18:24,433 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:18:24,434 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:18:24,434 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:18:24,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:18:24,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1935766706, now seen corresponding path program 1 times [2019-02-18 10:18:24,434 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:18:24,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:18:24,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:18:24,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:18:24,435 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:18:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:18:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:18:24,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:18:24,507 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:18:24,507 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:18:24,507 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [30], [32], [33] [2019-02-18 10:18:24,508 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:18:24,508 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:18:24,721 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:18:24,722 INFO L272 AbstractInterpreter]: Visited 7 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:18:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:18:24,722 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:18:24,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:18:24,722 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:18:24,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:18:24,731 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:18:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:18:24,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:18:24,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:18:24,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:18:24,757 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,759 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:18:24,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,777 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:18:24,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,785 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,787 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:18:24,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:18:24,800 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:24,845 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:24,869 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:24,888 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:24,903 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:24,917 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:24,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:18:24,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:24,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:18:25,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:18:25,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:18:25,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:18:25,146 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:25,173 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:25,199 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:25,226 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:25,255 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:25,304 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:18:25,304 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-02-18 10:18:25,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:18:25,344 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:18:25,506 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:18:25,506 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-02-18 10:18:25,561 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:25,563 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:18:25,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-02-18 10:18:25,564 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:25,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:18:25,598 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:42 [2019-02-18 10:18:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:18:25,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:18:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:18:25,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:18:25,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:18:25,967 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:18:25,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:18:25,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:18:25,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:18:25,967 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 8 states. [2019-02-18 10:18:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:18:36,660 INFO L93 Difference]: Finished difference Result 9947 states and 70395 transitions. [2019-02-18 10:18:36,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:18:36,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-02-18 10:18:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:18:36,697 INFO L225 Difference]: With dead ends: 9947 [2019-02-18 10:18:36,697 INFO L226 Difference]: Without dead ends: 9946 [2019-02-18 10:18:36,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:18:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9946 states. [2019-02-18 10:18:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9946 to 9927. [2019-02-18 10:18:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2019-02-18 10:18:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2019-02-18 10:18:47,446 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2019-02-18 10:18:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:18:47,446 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2019-02-18 10:18:47,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:18:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2019-02-18 10:18:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:18:47,454 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:18:47,455 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-02-18 10:18:47,455 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:18:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:18:47,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1937303618, now seen corresponding path program 3 times [2019-02-18 10:18:47,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:18:47,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:18:47,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:18:47,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:18:47,456 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:18:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:18:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:18:47,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:18:47,530 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:18:47,530 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:18:47,530 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:18:47,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:18:47,530 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:18:47,542 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-02-18 10:18:47,543 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-02-18 10:18:47,547 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-02-18 10:18:47,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:18:47,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:18:47,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:18:47,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:18:47,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,578 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:18:47,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,586 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:18:47,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:18:47,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-02-18 10:18:47,610 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,641 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,665 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,685 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,700 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,714 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-02-18 10:18:47,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-02-18 10:18:47,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-02-18 10:18:47,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:47,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-02-18 10:18:47,878 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,896 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,914 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,932 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:18:47,968 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:18:47,968 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-02-18 10:18:48,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-02-18 10:18:48,081 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:18:48,204 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2019-02-18 10:18:48,204 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:109 [2019-02-18 10:18:48,312 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,316 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,316 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:18:48,317 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2019-02-18 10:18:48,318 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:48,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2019-02-18 10:18:48,450 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2019-02-18 10:18:48,800 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 6 xjuncts. [2019-02-18 10:18:48,800 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:280 [2019-02-18 10:18:48,959 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2019-02-18 10:18:48,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,968 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:48,978 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:18:48,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 93 [2019-02-18 10:18:48,979 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:49,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,128 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,129 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,130 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,134 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-02-18 10:18:49,140 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:49,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,293 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:18:49,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 113 [2019-02-18 10:18:49,294 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:49,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2019-02-18 10:18:49,433 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:49,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2019-02-18 10:18:49,525 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:227, output treesize:161 [2019-02-18 10:18:49,610 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,612 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,613 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,614 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 78 [2019-02-18 10:18:49,618 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:49,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,753 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,755 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,757 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-02-18 10:18:49,759 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:49,884 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,892 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,893 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:49,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 108 [2019-02-18 10:18:49,902 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:50,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,029 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,030 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,032 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,036 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,038 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 100 [2019-02-18 10:18:50,046 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:50,155 INFO L267 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 4 xjuncts. [2019-02-18 10:18:50,155 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:209, output treesize:153 [2019-02-18 10:18:50,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,267 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,268 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,269 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,271 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:18:50,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 123 [2019-02-18 10:18:50,273 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:50,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,420 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,421 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,422 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,424 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,425 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,427 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 118 [2019-02-18 10:18:50,429 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:50,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,568 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,569 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,572 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,573 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,576 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,578 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,578 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:18:50,580 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 125 [2019-02-18 10:18:50,581 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:50,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:18:50,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 88 [2019-02-18 10:18:50,711 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:18:50,800 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2019-02-18 10:18:50,800 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:201, output treesize:141 [2019-02-18 10:18:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:18:50,901 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:18:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:18:51,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:18:51,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2019-02-18 10:18:51,086 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:18:51,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-02-18 10:18:51,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-02-18 10:18:51,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-02-18 10:18:51,087 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 13 states. [2019-02-18 10:18:51,290 WARN L181 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-02-18 10:18:51,589 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2019-02-18 10:18:51,913 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2019-02-18 10:18:52,498 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2019-02-18 10:18:53,241 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2019-02-18 10:18:54,877 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2019-02-18 10:19:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:19:07,359 INFO L93 Difference]: Finished difference Result 12394 states and 87417 transitions. [2019-02-18 10:19:07,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-02-18 10:19:07,359 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-02-18 10:19:07,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:19:07,405 INFO L225 Difference]: With dead ends: 12394 [2019-02-18 10:19:07,405 INFO L226 Difference]: Without dead ends: 12392 [2019-02-18 10:19:07,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-02-18 10:19:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2019-02-18 10:19:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 7195. [2019-02-18 10:19:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2019-02-18 10:19:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 51194 transitions. [2019-02-18 10:19:16,472 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 51194 transitions. Word has length 7 [2019-02-18 10:19:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:19:16,473 INFO L480 AbstractCegarLoop]: Abstraction has 7195 states and 51194 transitions. [2019-02-18 10:19:16,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-02-18 10:19:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 51194 transitions. [2019-02-18 10:19:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:19:16,479 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:19:16,479 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:19:16,479 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:19:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:19:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1937075524, now seen corresponding path program 1 times [2019-02-18 10:19:16,480 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:19:16,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:19:16,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:19:16,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:19:16,480 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:19:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:19:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:19:16,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:19:16,563 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:19:16,563 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:19:16,563 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [28], [30], [31] [2019-02-18 10:19:16,564 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:19:16,564 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:19:17,002 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:19:17,003 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:19:17,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:19:17,003 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:19:17,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:19:17,003 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:19:17,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:19:17,011 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:19:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:19:17,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:19:17,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:19:17,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:19:17,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,035 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:19:17,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:19:17,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:19:17,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:19:17,070 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,111 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,135 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,153 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,168 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,183 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:19:17,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,234 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:19:17,274 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:19:17,332 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,333 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,335 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,337 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:19:17,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:19:17,415 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,442 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,468 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,495 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,524 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,572 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:19:17,572 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-02-18 10:19:17,609 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:19:17,619 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:19:17,780 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:19:17,781 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2019-02-18 10:19:17,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 90 [2019-02-18 10:19:17,892 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:17,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,987 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,991 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,992 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,993 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:17,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 127 [2019-02-18 10:19:17,996 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:18,088 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:19:18,088 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:150, output treesize:94 [2019-02-18 10:19:18,134 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,145 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:19:18,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-02-18 10:19:18,148 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:18,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,235 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,236 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,237 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,244 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:19:18,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:18,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 138 [2019-02-18 10:19:18,247 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:18,343 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-02-18 10:19:18,344 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:118, output treesize:100 [2019-02-18 10:19:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:19:18,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:19:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:19:18,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:19:18,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:19:18,489 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:19:18,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:19:18,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:19:18,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:19:18,489 INFO L87 Difference]: Start difference. First operand 7195 states and 51194 transitions. Second operand 10 states. [2019-02-18 10:19:18,696 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2019-02-18 10:19:20,638 WARN L181 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-02-18 10:19:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:19:28,952 INFO L93 Difference]: Finished difference Result 7367 states and 52064 transitions. [2019-02-18 10:19:28,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:19:28,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-02-18 10:19:28,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:19:28,979 INFO L225 Difference]: With dead ends: 7367 [2019-02-18 10:19:28,979 INFO L226 Difference]: Without dead ends: 7366 [2019-02-18 10:19:28,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-02-18 10:19:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2019-02-18 10:19:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 7259. [2019-02-18 10:19:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7259 states. [2019-02-18 10:19:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 51642 transitions. [2019-02-18 10:19:38,458 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 51642 transitions. Word has length 7 [2019-02-18 10:19:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:19:38,458 INFO L480 AbstractCegarLoop]: Abstraction has 7259 states and 51642 transitions. [2019-02-18 10:19:38,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:19:38,458 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 51642 transitions. [2019-02-18 10:19:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:19:38,464 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:19:38,464 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:19:38,464 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:19:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:19:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1924490204, now seen corresponding path program 2 times [2019-02-18 10:19:38,465 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:19:38,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:19:38,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:19:38,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:19:38,465 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:19:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:19:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:19:38,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:19:38,637 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:19:38,637 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-02-18 10:19:38,638 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-02-18 10:19:38,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:19:38,638 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:19:38,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-02-18 10:19:38,650 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-02-18 10:19:38,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-02-18 10:19:38,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-02-18 10:19:38,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:19:38,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:19:38,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:19:38,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:19:38,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:19:38,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:19:38,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:19:38,718 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:38,763 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:38,789 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:38,810 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:38,826 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:38,841 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:38,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:19:38,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:19:38,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,968 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:38,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:19:39,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,030 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,031 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,032 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:19:39,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:19:39,115 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:39,144 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:39,172 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:39,201 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:39,231 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:19:39,282 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:19:39,282 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-02-18 10:19:39,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:19:39,325 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:39,375 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:19:39,376 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-02-18 10:19:39,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-02-18 10:19:39,420 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:39,477 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:19:39,477 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-02-18 10:19:39,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,521 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,525 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,527 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:19:39,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-02-18 10:19:39,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:39,582 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:19:39,583 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-02-18 10:19:39,609 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,610 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,612 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,613 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,620 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:19:39,627 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:19:39,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-02-18 10:19:39,628 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:19:39,683 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:19:39,683 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2019-02-18 10:19:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:19:39,714 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:19:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:19:39,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:19:39,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2019-02-18 10:19:39,791 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:19:39,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-02-18 10:19:39,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-02-18 10:19:39,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:19:39,792 INFO L87 Difference]: Start difference. First operand 7259 states and 51642 transitions. Second operand 11 states. [2019-02-18 10:19:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:19:56,789 INFO L93 Difference]: Finished difference Result 9936 states and 70364 transitions. [2019-02-18 10:19:56,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-02-18 10:19:56,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-02-18 10:19:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:19:56,828 INFO L225 Difference]: With dead ends: 9936 [2019-02-18 10:19:56,828 INFO L226 Difference]: Without dead ends: 9935 [2019-02-18 10:19:56,831 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-02-18 10:19:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9935 states. [2019-02-18 10:20:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9935 to 8951. [2019-02-18 10:20:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8951 states. [2019-02-18 10:20:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8951 states to 8951 states and 63743 transitions. [2019-02-18 10:20:11,181 INFO L78 Accepts]: Start accepts. Automaton has 8951 states and 63743 transitions. Word has length 7 [2019-02-18 10:20:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:20:11,181 INFO L480 AbstractCegarLoop]: Abstraction has 8951 states and 63743 transitions. [2019-02-18 10:20:11,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-02-18 10:20:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 8951 states and 63743 transitions. [2019-02-18 10:20:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:20:11,189 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:20:11,189 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:20:11,189 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:20:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:20:11,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1928257388, now seen corresponding path program 1 times [2019-02-18 10:20:11,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:20:11,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:20:11,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-02-18 10:20:11,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:20:11,190 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:20:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:20:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:20:11,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:20:11,302 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:20:11,302 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:20:11,302 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [30], [31] [2019-02-18 10:20:11,303 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:20:11,303 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:20:11,604 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:20:11,604 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-02-18 10:20:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:20:11,604 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:20:11,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:20:11,604 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:20:11,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:20:11,612 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:20:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:20:11,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:20:11,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-02-18 10:20:11,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-02-18 10:20:11,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-02-18 10:20:11,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,753 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,755 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-02-18 10:20:11,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:11,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-02-18 10:20:11,831 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:20:11,859 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:11,885 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:11,911 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:11,941 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:11,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:20:11,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:20:11,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:20:11,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:20:11,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:20:11,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-02-18 10:20:11,997 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:20:12,033 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:12,052 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:12,068 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:12,081 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:12,094 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:12,140 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:20:12,140 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-02-18 10:20:12,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:20:12,186 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:20:12,346 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-02-18 10:20:12,346 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-02-18 10:20:12,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,404 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:20:12,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-02-18 10:20:12,404 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:20:12,438 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:20:12,439 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2019-02-18 10:20:12,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:12,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-02-18 10:20:12,473 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:20:12,509 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:20:12,509 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2019-02-18 10:20:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:20:12,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:20:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:20:12,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:20:12,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 10:20:12,580 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:20:12,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 10:20:12,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 10:20:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-02-18 10:20:12,580 INFO L87 Difference]: Start difference. First operand 8951 states and 63743 transitions. Second operand 10 states. [2019-02-18 10:20:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:20:27,864 INFO L93 Difference]: Finished difference Result 9235 states and 65371 transitions. [2019-02-18 10:20:27,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 10:20:27,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-02-18 10:20:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:20:27,894 INFO L225 Difference]: With dead ends: 9235 [2019-02-18 10:20:27,894 INFO L226 Difference]: Without dead ends: 9232 [2019-02-18 10:20:27,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-02-18 10:20:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2019-02-18 10:20:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 9044. [2019-02-18 10:20:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9044 states. [2019-02-18 10:20:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 64394 transitions. [2019-02-18 10:20:42,198 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 64394 transitions. Word has length 7 [2019-02-18 10:20:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:20:42,199 INFO L480 AbstractCegarLoop]: Abstraction has 9044 states and 64394 transitions. [2019-02-18 10:20:42,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 10:20:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 64394 transitions. [2019-02-18 10:20:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:20:42,206 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:20:42,206 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:20:42,206 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:20:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:20:42,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1928378538, now seen corresponding path program 1 times [2019-02-18 10:20:42,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:20:42,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:20:42,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:20:42,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:20:42,207 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:20:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:20:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-02-18 10:20:42,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:20:42,332 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:20:42,332 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:20:42,332 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [30], [32], [33] [2019-02-18 10:20:42,335 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:20:42,336 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:20:42,543 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:20:42,543 INFO L272 AbstractInterpreter]: Visited 7 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 10:20:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:20:42,543 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:20:42,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:20:42,544 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:20:42,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:20:42,552 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:20:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:20:42,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:20:42,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-02-18 10:20:42,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-02-18 10:20:42,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-02-18 10:20:42,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-02-18 10:20:42,677 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,693 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,708 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,725 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:20:42,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-18 10:20:42,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-02-18 10:20:42,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-02-18 10:20:42,762 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-02-18 10:20:42,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-02-18 10:20:42,772 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,797 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,816 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,831 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,843 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,854 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:20:42,885 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:20:42,885 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-02-18 10:20:42,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:42,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-02-18 10:20:42,938 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 10:20:43,031 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-02-18 10:20:43,032 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-02-18 10:20:43,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:43,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:43,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:43,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:20:43,076 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:20:43,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2019-02-18 10:20:43,077 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:20:43,098 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:20:43,098 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:29 [2019-02-18 10:20:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:20:44,276 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:20:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:20:44,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:20:44,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 10:20:44,319 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:20:44,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 10:20:44,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 10:20:44,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-02-18 10:20:44,320 INFO L87 Difference]: Start difference. First operand 9044 states and 64394 transitions. Second operand 8 states. [2019-02-18 10:20:58,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 10:20:58,212 INFO L93 Difference]: Finished difference Result 9065 states and 64420 transitions. [2019-02-18 10:20:58,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 10:20:58,212 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-02-18 10:20:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 10:20:58,240 INFO L225 Difference]: With dead ends: 9065 [2019-02-18 10:20:58,240 INFO L226 Difference]: Without dead ends: 9064 [2019-02-18 10:20:58,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-02-18 10:20:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2019-02-18 10:21:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 9045. [2019-02-18 10:21:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9045 states. [2019-02-18 10:21:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9045 states to 9045 states and 64401 transitions. [2019-02-18 10:21:12,598 INFO L78 Accepts]: Start accepts. Automaton has 9045 states and 64401 transitions. Word has length 7 [2019-02-18 10:21:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 10:21:12,598 INFO L480 AbstractCegarLoop]: Abstraction has 9045 states and 64401 transitions. [2019-02-18 10:21:12,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 10:21:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 9045 states and 64401 transitions. [2019-02-18 10:21:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-02-18 10:21:12,606 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 10:21:12,606 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-02-18 10:21:12,606 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-02-18 10:21:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:21:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1904967206, now seen corresponding path program 1 times [2019-02-18 10:21:12,606 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 10:21:12,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:21:12,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:21:12,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 10:21:12,607 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 10:21:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:21:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:21:12,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:21:12,691 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 10:21:12,691 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-02-18 10:21:12,691 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [24], [27] [2019-02-18 10:21:12,692 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-18 10:21:12,692 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 10:21:13,112 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 10:21:13,112 INFO L272 AbstractInterpreter]: Visited 7 different actions 13 times. Merged at 1 different actions 1 times. Never widened. Found 10 fixpoints after 6 different actions. Largest state had 0 variables. [2019-02-18 10:21:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 10:21:13,112 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 10:21:13,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 10:21:13,112 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 10:21:13,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 10:21:13,207 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 10:21:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 10:21:13,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 10:21:13,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-02-18 10:21:13,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-02-18 10:21:13,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,330 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-02-18 10:21:13,385 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,388 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-02-18 10:21:13,460 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-02-18 10:21:13,472 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,504 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,535 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,567 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,600 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-18 10:21:13,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-02-18 10:21:13,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-02-18 10:21:13,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-02-18 10:21:13,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-02-18 10:21:13,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-02-18 10:21:13,662 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,697 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,718 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,734 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,748 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,759 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,806 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:92, output treesize:91 [2019-02-18 10:21:13,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-02-18 10:21:13,862 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:21:13,908 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-02-18 10:21:13,908 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:101, output treesize:71 [2019-02-18 10:21:13,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:13,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-02-18 10:21:13,963 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:21:14,010 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-02-18 10:21:14,011 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:55 [2019-02-18 10:21:14,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,101 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:21:14,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-02-18 10:21:14,104 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:21:14,154 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-18 10:21:14,155 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:47 [2019-02-18 10:21:14,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,187 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,191 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,198 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:21:14,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-02-18 10:21:14,200 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:21:14,253 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-18 10:21:14,254 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:61, output treesize:49 [2019-02-18 10:21:14,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,302 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 10:21:14,305 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 10:21:14,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 127 [2019-02-18 10:21:14,306 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 10:21:14,359 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-18 10:21:14,359 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:53 [2019-02-18 10:21:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:21:14,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 10:21:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 10:21:14,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 10:21:14,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-02-18 10:21:14,504 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 10:21:14,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-02-18 10:21:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-02-18 10:21:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2019-02-18 10:21:14,505 INFO L87 Difference]: Start difference. First operand 9045 states and 64401 transitions. Second operand 14 states.