java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-5-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-e1a14da [2018-12-24 13:59:24,096 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 13:59:24,098 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 13:59:24,110 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-24 13:59:24,110 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-24 13:59:24,111 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-24 13:59:24,112 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-24 13:59:24,114 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-24 13:59:24,116 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-24 13:59:24,117 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-24 13:59:24,118 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-24 13:59:24,118 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-24 13:59:24,119 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-24 13:59:24,120 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-24 13:59:24,121 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-24 13:59:24,122 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-24 13:59:24,123 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-24 13:59:24,125 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-24 13:59:24,127 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-24 13:59:24,129 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-24 13:59:24,130 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-24 13:59:24,131 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-24 13:59:24,133 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-24 13:59:24,134 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-24 13:59:24,134 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-24 13:59:24,135 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-24 13:59:24,136 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-24 13:59:24,137 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-24 13:59:24,137 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-24 13:59:24,139 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-24 13:59:24,139 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-24 13:59:24,139 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-24 13:59:24,140 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-24 13:59:24,140 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-24 13:59:24,141 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-24 13:59:24,142 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-24 13:59:24,142 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2018-12-24 13:59:24,155 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 13:59:24,155 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 13:59:24,156 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 13:59:24,156 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 13:59:24,156 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 13:59:24,157 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 13:59:24,157 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 13:59:24,157 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 13:59:24,157 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-24 13:59:24,157 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 13:59:24,158 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-24 13:59:24,158 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-24 13:59:24,158 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 13:59:24,158 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 13:59:24,159 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 13:59:24,159 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 13:59:24,159 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 13:59:24,160 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 13:59:24,160 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 13:59:24,160 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 13:59:24,160 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 13:59:24,160 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 13:59:24,161 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 13:59:24,161 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 13:59:24,161 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 13:59:24,161 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 13:59:24,161 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 13:59:24,162 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 13:59:24,162 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 13:59:24,162 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 13:59:24,162 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 13:59:24,162 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 13:59:24,163 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 13:59:24,163 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 13:59:24,163 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 13:59:24,163 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 13:59:24,164 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 13:59:24,164 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 13:59:24,164 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 13:59:24,164 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 13:59:24,194 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 13:59:24,207 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 13:59:24,211 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 13:59:24,213 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 13:59:24,213 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 13:59:24,214 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-5-unlimited.bpl [2018-12-24 13:59:24,215 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-5-unlimited.bpl' [2018-12-24 13:59:24,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 13:59:24,264 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 13:59:24,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:24,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 13:59:24,265 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 13:59:24,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... [2018-12-24 13:59:24,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... [2018-12-24 13:59:24,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:24,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 13:59:24,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 13:59:24,332 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 13:59:24,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... [2018-12-24 13:59:24,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... [2018-12-24 13:59:24,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... [2018-12-24 13:59:24,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... [2018-12-24 13:59:24,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... [2018-12-24 13:59:24,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... [2018-12-24 13:59:24,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... [2018-12-24 13:59:24,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 13:59:24,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 13:59:24,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 13:59:24,359 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 13:59:24,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 13:59:24,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 13:59:24,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 13:59:24,768 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 13:59:24,768 INFO L280 CfgBuilder]: Removed 13 assue(true) statements. [2018-12-24 13:59:24,769 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:24 BoogieIcfgContainer [2018-12-24 13:59:24,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 13:59:24,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 13:59:24,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 13:59:24,785 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 13:59:24,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:24" (1/2) ... [2018-12-24 13:59:24,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5957cea2 and model type speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 01:59:24, skipping insertion in model container [2018-12-24 13:59:24,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-5-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:24" (2/2) ... [2018-12-24 13:59:24,796 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-5-unlimited.bpl [2018-12-24 13:59:24,830 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 13:59:24,844 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-12-24 13:59:24,884 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-12-24 13:59:24,926 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 13:59:24,927 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 13:59:24,927 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 13:59:24,927 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 13:59:24,927 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 13:59:24,928 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 13:59:24,928 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 13:59:24,928 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 13:59:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-12-24 13:59:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-24 13:59:24,965 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:24,966 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-24 13:59:24,969 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 984, now seen corresponding path program 1 times [2018-12-24 13:59:24,980 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:25,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:25,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:25,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:25,034 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:25,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 13:59:25,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 13:59:25,179 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:25,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 13:59:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 13:59:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:25,202 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2018-12-24 13:59:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:25,373 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-12-24 13:59:25,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:25,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-24 13:59:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:25,388 INFO L225 Difference]: With dead ends: 25 [2018-12-24 13:59:25,388 INFO L226 Difference]: Without dead ends: 20 [2018-12-24 13:59:25,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-24 13:59:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 12. [2018-12-24 13:59:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-24 13:59:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 21 transitions. [2018-12-24 13:59:25,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 21 transitions. Word has length 2 [2018-12-24 13:59:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:25,431 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 21 transitions. [2018-12-24 13:59:25,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 13:59:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 21 transitions. [2018-12-24 13:59:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:25,432 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:25,432 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:25,432 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash 30372, now seen corresponding path program 1 times [2018-12-24 13:59:25,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:25,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:25,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:25,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:25,435 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:25,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:25,626 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:25,627 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:25,629 INFO L207 CegarAbsIntRunner]: [0], [18], [23] [2018-12-24 13:59:25,668 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:25,669 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:25,745 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:25,747 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 54 root evaluator evaluations with a maximum evaluation depth of 2. Performed 54 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:25,757 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:25,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:25,757 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:25,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:25,775 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:25,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:26,025 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-12-24 13:59:26,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:26,086 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 31 treesize of output 40 [2018-12-24 13:59:26,307 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-12-24 13:59:26,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:26,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:26,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 42 [2018-12-24 13:59:26,521 WARN L181 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2018-12-24 13:59:26,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:26,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:26,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:26,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:26,634 INFO L303 Elim1Store]: Index analysis took 110 ms [2018-12-24 13:59:26,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:26,637 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:26,674 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:26,693 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:26,856 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 18 treesize of output 21 [2018-12-24 13:59:26,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 13:59:26,870 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 23 treesize of output 37 [2018-12-24 13:59:26,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 13:59:26,912 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:26,914 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:26,949 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:26,992 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:27,035 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:27,076 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:27,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:27,118 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:27,262 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2018-12-24 13:59:27,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:27,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 13:59:27,308 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:27,348 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:27,348 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:33 [2018-12-24 13:59:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:27,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:27,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:27,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:27,506 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:27,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:27,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:27,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:27,509 INFO L87 Difference]: Start difference. First operand 12 states and 21 transitions. Second operand 6 states. [2018-12-24 13:59:27,684 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-12-24 13:59:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:28,192 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2018-12-24 13:59:28,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:28,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:28,195 INFO L225 Difference]: With dead ends: 39 [2018-12-24 13:59:28,196 INFO L226 Difference]: Without dead ends: 37 [2018-12-24 13:59:28,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-24 13:59:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 16. [2018-12-24 13:59:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-24 13:59:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 32 transitions. [2018-12-24 13:59:28,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 32 transitions. Word has length 3 [2018-12-24 13:59:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:28,204 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 32 transitions. [2018-12-24 13:59:28,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 32 transitions. [2018-12-24 13:59:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:28,205 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:28,205 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:28,206 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:28,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:28,206 INFO L82 PathProgramCache]: Analyzing trace with hash 30434, now seen corresponding path program 1 times [2018-12-24 13:59:28,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:28,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:28,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:28,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:28,208 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:28,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:28,320 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:28,320 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:28,321 INFO L207 CegarAbsIntRunner]: [0], [20], [23] [2018-12-24 13:59:28,325 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:28,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:28,332 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:28,332 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 54 root evaluator evaluations with a maximum evaluation depth of 2. Performed 54 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:28,333 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:28,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:28,333 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:28,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:28,351 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:28,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:28,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:28,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 40 [2018-12-24 13:59:28,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:28,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:28,453 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 27 treesize of output 42 [2018-12-24 13:59:28,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:28,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:28,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:28,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:28,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:28,504 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:28,539 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:28,554 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:28,607 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 18 treesize of output 21 [2018-12-24 13:59:28,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 13:59:28,619 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 23 treesize of output 37 [2018-12-24 13:59:28,635 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 25 treesize of output 51 [2018-12-24 13:59:28,652 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:28,654 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:28,692 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:28,730 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:28,744 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:28,755 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:28,819 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:28,820 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:28,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:28,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 13:59:28,914 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 13:59:29,160 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 16 dim-0 vars, and 5 xjuncts. [2018-12-24 13:59:29,160 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:231 [2018-12-24 13:59:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:29,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:29,305 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 13:59:29,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 13:59:29,305 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:29,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 13:59:29,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 13:59:29,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 13:59:29,307 INFO L87 Difference]: Start difference. First operand 16 states and 32 transitions. Second operand 4 states. [2018-12-24 13:59:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:29,357 INFO L93 Difference]: Finished difference Result 18 states and 39 transitions. [2018-12-24 13:59:29,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:29,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-24 13:59:29,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:29,361 INFO L225 Difference]: With dead ends: 18 [2018-12-24 13:59:29,361 INFO L226 Difference]: Without dead ends: 17 [2018-12-24 13:59:29,361 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 13:59:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-24 13:59:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-24 13:59:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-24 13:59:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 38 transitions. [2018-12-24 13:59:29,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 38 transitions. Word has length 3 [2018-12-24 13:59:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:29,366 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 38 transitions. [2018-12-24 13:59:29,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 13:59:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 38 transitions. [2018-12-24 13:59:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:29,367 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:29,367 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:29,368 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:29,368 INFO L82 PathProgramCache]: Analyzing trace with hash 30560, now seen corresponding path program 1 times [2018-12-24 13:59:29,368 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:29,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:29,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:29,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:29,370 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:29,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 13:59:29,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 13:59:29,490 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:29,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 13:59:29,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 13:59:29,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:29,492 INFO L87 Difference]: Start difference. First operand 17 states and 38 transitions. Second operand 3 states. [2018-12-24 13:59:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:29,532 INFO L93 Difference]: Finished difference Result 21 states and 39 transitions. [2018-12-24 13:59:29,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:29,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-24 13:59:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:29,533 INFO L225 Difference]: With dead ends: 21 [2018-12-24 13:59:29,533 INFO L226 Difference]: Without dead ends: 20 [2018-12-24 13:59:29,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-24 13:59:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-12-24 13:59:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-24 13:59:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 37 transitions. [2018-12-24 13:59:29,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 37 transitions. Word has length 3 [2018-12-24 13:59:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:29,541 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 37 transitions. [2018-12-24 13:59:29,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 13:59:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 37 transitions. [2018-12-24 13:59:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:29,542 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:29,542 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:29,543 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash 30124, now seen corresponding path program 1 times [2018-12-24 13:59:29,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:29,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:29,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:29,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:29,545 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:29,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:29,649 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:29,649 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:29,650 INFO L207 CegarAbsIntRunner]: [0], [10], [23] [2018-12-24 13:59:29,651 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:29,651 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:29,659 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:29,659 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 54 root evaluator evaluations with a maximum evaluation depth of 2. Performed 54 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:29,660 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:29,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:29,660 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:29,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:29,671 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:29,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:29,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 13:59:29,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 13:59:29,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:29,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:29,764 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 23 treesize of output 37 [2018-12-24 13:59:29,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:29,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:29,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:29,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 13:59:29,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:29,790 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:29,849 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:29,910 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:29,923 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:29,933 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:29,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:29,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 40 [2018-12-24 13:59:30,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,020 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 27 treesize of output 42 [2018-12-24 13:59:30,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:30,128 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:30,140 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:30,150 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:30,170 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:30,170 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:30,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 51 [2018-12-24 13:59:30,218 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:30,245 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:30,246 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:33 [2018-12-24 13:59:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:30,261 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:30,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:30,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:30,298 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:30,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:30,298 INFO L87 Difference]: Start difference. First operand 17 states and 37 transitions. Second operand 6 states. [2018-12-24 13:59:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:30,445 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2018-12-24 13:59:30,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:30,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:30,448 INFO L225 Difference]: With dead ends: 39 [2018-12-24 13:59:30,448 INFO L226 Difference]: Without dead ends: 38 [2018-12-24 13:59:30,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-24 13:59:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 18. [2018-12-24 13:59:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-24 13:59:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 43 transitions. [2018-12-24 13:59:30,454 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 43 transitions. Word has length 3 [2018-12-24 13:59:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:30,454 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 43 transitions. [2018-12-24 13:59:30,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 43 transitions. [2018-12-24 13:59:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:30,455 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:30,455 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:30,456 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash 941462, now seen corresponding path program 1 times [2018-12-24 13:59:30,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:30,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:30,457 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:30,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:30,526 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:30,527 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:30,527 INFO L207 CegarAbsIntRunner]: [0], [18], [20], [23] [2018-12-24 13:59:30,528 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:30,529 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:30,534 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:30,534 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:30,535 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:30,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:30,535 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:30,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:30,544 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:30,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:30,656 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-12-24 13:59:30,660 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 18 treesize of output 21 [2018-12-24 13:59:30,668 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 21 treesize of output 27 [2018-12-24 13:59:30,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-12-24 13:59:30,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,723 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 25 treesize of output 51 [2018-12-24 13:59:30,754 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:30,755 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:30,772 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:30,787 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:30,800 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:30,809 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:30,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:30,891 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 31 treesize of output 40 [2018-12-24 13:59:30,997 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-12-24 13:59:31,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,017 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 27 treesize of output 42 [2018-12-24 13:59:31,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:31,049 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:31,059 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:31,068 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:31,089 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:31,089 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:31,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 54 [2018-12-24 13:59:31,287 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 13:59:31,521 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 13:59:31,521 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:74 [2018-12-24 13:59:31,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:31,726 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 6 case distinctions, treesize of input 50 treesize of output 80 [2018-12-24 13:59:31,729 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-24 13:59:32,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:32,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:32,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:32,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:32,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:32,033 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:32,035 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 45 treesize of output 51 [2018-12-24 13:59:32,035 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:32,133 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 16 dim-0 vars, and 5 xjuncts. [2018-12-24 13:59:32,134 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:96, output treesize:167 [2018-12-24 13:59:32,347 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 65 [2018-12-24 13:59:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:32,350 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:32,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:32,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:32,428 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:32,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:32,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:32,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:32,429 INFO L87 Difference]: Start difference. First operand 18 states and 43 transitions. Second operand 8 states. [2018-12-24 13:59:34,707 WARN L181 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2018-12-24 13:59:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:34,954 INFO L93 Difference]: Finished difference Result 59 states and 105 transitions. [2018-12-24 13:59:34,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 13:59:34,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:34,956 INFO L225 Difference]: With dead ends: 59 [2018-12-24 13:59:34,957 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 13:59:34,958 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-24 13:59:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 13:59:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 20. [2018-12-24 13:59:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-24 13:59:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 59 transitions. [2018-12-24 13:59:34,966 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 59 transitions. Word has length 4 [2018-12-24 13:59:34,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:34,966 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 59 transitions. [2018-12-24 13:59:34,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 59 transitions. [2018-12-24 13:59:34,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:34,967 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:34,967 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:34,967 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:34,968 INFO L82 PathProgramCache]: Analyzing trace with hash 941588, now seen corresponding path program 1 times [2018-12-24 13:59:34,968 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:34,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:34,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:34,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:34,969 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:35,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:35,042 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:35,042 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:35,042 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [25] [2018-12-24 13:59:35,044 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:35,044 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:35,053 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:35,053 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:35,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:35,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:35,054 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:35,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:35,064 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:35,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:35,077 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 18 treesize of output 21 [2018-12-24 13:59:35,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 13:59:35,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,095 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 23 treesize of output 33 [2018-12-24 13:59:35,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 13:59:35,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 46 [2018-12-24 13:59:35,130 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,159 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,175 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,185 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,197 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,217 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 26 treesize of output 25 [2018-12-24 13:59:35,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,319 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 22 treesize of output 38 [2018-12-24 13:59:35,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2018-12-24 13:59:35,382 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,389 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,400 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:35,422 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:44, output treesize:46 [2018-12-24 13:59:35,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2018-12-24 13:59:35,457 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,473 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:35,474 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:29 [2018-12-24 13:59:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:35,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:35,526 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 13:59:35,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2018-12-24 13:59:35,527 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:35,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 13:59:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 13:59:35,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:35,528 INFO L87 Difference]: Start difference. First operand 20 states and 59 transitions. Second operand 4 states. [2018-12-24 13:59:35,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:35,685 INFO L93 Difference]: Finished difference Result 25 states and 74 transitions. [2018-12-24 13:59:35,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:35,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 13:59:35,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:35,687 INFO L225 Difference]: With dead ends: 25 [2018-12-24 13:59:35,687 INFO L226 Difference]: Without dead ends: 24 [2018-12-24 13:59:35,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:35,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-24 13:59:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-12-24 13:59:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-24 13:59:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 73 transitions. [2018-12-24 13:59:35,705 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 73 transitions. Word has length 4 [2018-12-24 13:59:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:35,707 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 73 transitions. [2018-12-24 13:59:35,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 13:59:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 73 transitions. [2018-12-24 13:59:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:35,708 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:35,708 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:35,708 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash 941152, now seen corresponding path program 1 times [2018-12-24 13:59:35,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:35,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:35,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:35,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:35,711 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:35,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:35,860 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:35,860 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:35,860 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [23] [2018-12-24 13:59:35,862 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:35,862 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:35,869 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:35,869 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:35,870 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:35,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:35,870 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:35,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:35,882 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:35,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:35,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 13:59:35,919 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 21 treesize of output 27 [2018-12-24 13:59:35,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,931 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 23 treesize of output 37 [2018-12-24 13:59:35,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:35,942 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 25 treesize of output 51 [2018-12-24 13:59:35,960 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:35,961 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:35,985 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:36,003 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:36,018 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:36,030 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:36,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,061 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 31 treesize of output 40 [2018-12-24 13:59:36,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 42 [2018-12-24 13:59:36,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:36,154 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:36,165 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:36,176 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:36,201 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:36,201 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:36,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 13:59:36,252 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:36,278 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:36,278 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2018-12-24 13:59:36,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:36,375 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:36,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 60 [2018-12-24 13:59:36,377 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:36,416 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:36,417 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:29 [2018-12-24 13:59:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:36,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:36,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:36,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:36,484 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:36,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:36,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:36,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:36,485 INFO L87 Difference]: Start difference. First operand 23 states and 73 transitions. Second operand 8 states. [2018-12-24 13:59:36,640 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-12-24 13:59:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:37,084 INFO L93 Difference]: Finished difference Result 56 states and 117 transitions. [2018-12-24 13:59:37,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 13:59:37,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:37,087 INFO L225 Difference]: With dead ends: 56 [2018-12-24 13:59:37,087 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 13:59:37,088 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 13:59:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 24. [2018-12-24 13:59:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-24 13:59:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 79 transitions. [2018-12-24 13:59:37,097 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 79 transitions. Word has length 4 [2018-12-24 13:59:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:37,097 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 79 transitions. [2018-12-24 13:59:37,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:37,098 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 79 transitions. [2018-12-24 13:59:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:37,098 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:37,098 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:37,099 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash 941276, now seen corresponding path program 1 times [2018-12-24 13:59:37,099 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:37,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:37,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:37,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:37,100 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:37,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:37,180 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:37,180 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:37,181 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [23] [2018-12-24 13:59:37,185 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:37,185 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:37,189 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:37,189 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:37,190 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:37,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:37,190 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:37,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:37,199 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:37,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:37,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 40 [2018-12-24 13:59:37,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,264 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 27 treesize of output 42 [2018-12-24 13:59:37,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:37,305 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,317 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,328 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 13:59:37,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 27 [2018-12-24 13:59:37,353 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 23 treesize of output 37 [2018-12-24 13:59:37,359 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 25 treesize of output 51 [2018-12-24 13:59:37,393 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:37,394 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,415 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,430 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,447 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,458 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,482 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:37,483 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:37,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 13:59:37,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,552 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:37,552 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2018-12-24 13:59:37,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:37,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2018-12-24 13:59:37,587 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:37,612 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:37,613 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:27 [2018-12-24 13:59:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:37,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:37,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:37,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:37,690 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:37,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:37,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:37,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:37,691 INFO L87 Difference]: Start difference. First operand 24 states and 79 transitions. Second operand 8 states. [2018-12-24 13:59:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:38,057 INFO L93 Difference]: Finished difference Result 52 states and 120 transitions. [2018-12-24 13:59:38,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:38,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:38,059 INFO L225 Difference]: With dead ends: 52 [2018-12-24 13:59:38,059 INFO L226 Difference]: Without dead ends: 48 [2018-12-24 13:59:38,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-24 13:59:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2018-12-24 13:59:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-24 13:59:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 90 transitions. [2018-12-24 13:59:38,069 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 90 transitions. Word has length 4 [2018-12-24 13:59:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:38,069 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 90 transitions. [2018-12-24 13:59:38,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 90 transitions. [2018-12-24 13:59:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:38,070 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:38,070 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:38,070 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash 943510, now seen corresponding path program 1 times [2018-12-24 13:59:38,071 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:38,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:38,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:38,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:38,072 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:38,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:38,230 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:38,231 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:38,231 INFO L207 CegarAbsIntRunner]: [0], [20], [24], [25] [2018-12-24 13:59:38,235 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:38,235 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:38,239 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:38,239 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:38,240 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:38,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:38,240 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:38,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:38,250 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:38,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:38,275 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 18 treesize of output 21 [2018-12-24 13:59:38,286 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 21 treesize of output 23 [2018-12-24 13:59:38,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,293 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 23 treesize of output 33 [2018-12-24 13:59:38,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,308 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 25 treesize of output 47 [2018-12-24 13:59:38,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 13:59:38,323 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,355 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,368 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,379 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,388 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 13:59:38,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 13:59:38,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 13:59:38,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 13:59:38,507 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,558 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,573 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,589 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,617 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:38,618 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:61, output treesize:62 [2018-12-24 13:59:38,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:38,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 13:59:38,706 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:38,741 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:38,742 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:46 [2018-12-24 13:59:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:38,757 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:38,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:38,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:38,786 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:38,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:38,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:38,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:38,787 INFO L87 Difference]: Start difference. First operand 26 states and 90 transitions. Second operand 6 states. [2018-12-24 13:59:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:38,939 INFO L93 Difference]: Finished difference Result 42 states and 110 transitions. [2018-12-24 13:59:38,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:38,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 13:59:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:38,941 INFO L225 Difference]: With dead ends: 42 [2018-12-24 13:59:38,941 INFO L226 Difference]: Without dead ends: 41 [2018-12-24 13:59:38,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-24 13:59:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-12-24 13:59:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-24 13:59:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 90 transitions. [2018-12-24 13:59:38,950 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 90 transitions. Word has length 4 [2018-12-24 13:59:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:38,950 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 90 transitions. [2018-12-24 13:59:38,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 90 transitions. [2018-12-24 13:59:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:38,951 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:38,951 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:38,951 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:38,951 INFO L82 PathProgramCache]: Analyzing trace with hash 943074, now seen corresponding path program 1 times [2018-12-24 13:59:38,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:38,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:38,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:38,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:38,952 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:39,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:39,060 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:39,061 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:39,061 INFO L207 CegarAbsIntRunner]: [0], [10], [20], [23] [2018-12-24 13:59:39,062 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:39,062 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:39,067 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:39,067 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:39,068 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:39,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:39,068 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:39,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:39,076 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:39,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:39,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 13:59:39,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 13:59:39,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,122 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 23 treesize of output 37 [2018-12-24 13:59:39,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 13:59:39,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,146 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 13:59:39,146 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,176 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,193 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,205 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,219 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:39,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:39,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:39,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:39,372 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,387 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,403 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,419 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,449 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:39,449 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:69, output treesize:66 [2018-12-24 13:59:39,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 13:59:39,475 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,505 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. [2018-12-24 13:59:39,506 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:39,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:39,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 13:59:39,536 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:39,569 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:39,569 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2018-12-24 13:59:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:39,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:39,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:39,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:39,636 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:39,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:39,637 INFO L87 Difference]: Start difference. First operand 26 states and 90 transitions. Second operand 8 states. [2018-12-24 13:59:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:40,011 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2018-12-24 13:59:40,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:40,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:40,013 INFO L225 Difference]: With dead ends: 54 [2018-12-24 13:59:40,013 INFO L226 Difference]: Without dead ends: 53 [2018-12-24 13:59:40,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-24 13:59:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 27. [2018-12-24 13:59:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-24 13:59:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 96 transitions. [2018-12-24 13:59:40,023 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 96 transitions. Word has length 4 [2018-12-24 13:59:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:40,023 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 96 transitions. [2018-12-24 13:59:40,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 96 transitions. [2018-12-24 13:59:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:40,024 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:40,024 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:40,024 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash 929868, now seen corresponding path program 1 times [2018-12-24 13:59:40,025 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:40,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:40,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:40,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:40,026 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:40,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:40,125 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:40,125 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:40,125 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [23] [2018-12-24 13:59:40,126 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:40,127 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:40,131 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:40,131 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:40,132 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:40,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:40,132 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:40,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:40,141 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:40,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:40,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,177 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 31 treesize of output 40 [2018-12-24 13:59:40,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,206 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 27 treesize of output 42 [2018-12-24 13:59:40,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:40,238 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,249 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,258 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,275 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 18 treesize of output 21 [2018-12-24 13:59:40,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 27 [2018-12-24 13:59:40,280 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 23 treesize of output 37 [2018-12-24 13:59:40,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 13:59:40,305 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:40,306 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,323 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,337 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,349 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,360 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,384 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:40,385 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:40,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 51 [2018-12-24 13:59:40,423 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,448 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. [2018-12-24 13:59:40,449 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2018-12-24 13:59:40,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:40,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 13:59:40,471 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:40,491 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:40,491 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:25 [2018-12-24 13:59:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:40,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:40,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:40,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 13:59:40,544 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:40,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:40,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:40,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 13:59:40,544 INFO L87 Difference]: Start difference. First operand 27 states and 96 transitions. Second operand 8 states. [2018-12-24 13:59:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:40,832 INFO L93 Difference]: Finished difference Result 63 states and 165 transitions. [2018-12-24 13:59:40,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 13:59:40,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:40,833 INFO L225 Difference]: With dead ends: 63 [2018-12-24 13:59:40,833 INFO L226 Difference]: Without dead ends: 61 [2018-12-24 13:59:40,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 13:59:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-24 13:59:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 32. [2018-12-24 13:59:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-24 13:59:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 113 transitions. [2018-12-24 13:59:40,845 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 113 transitions. Word has length 4 [2018-12-24 13:59:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:40,845 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 113 transitions. [2018-12-24 13:59:40,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 113 transitions. [2018-12-24 13:59:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:40,846 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:40,846 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:40,846 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash 930056, now seen corresponding path program 1 times [2018-12-24 13:59:40,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:40,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:40,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:40,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:40,851 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 13:59:40,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 13:59:40,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-24 13:59:40,909 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:40,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 13:59:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 13:59:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-24 13:59:40,910 INFO L87 Difference]: Start difference. First operand 32 states and 113 transitions. Second operand 4 states. [2018-12-24 13:59:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:41,005 INFO L93 Difference]: Finished difference Result 41 states and 126 transitions. [2018-12-24 13:59:41,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:41,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 13:59:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:41,007 INFO L225 Difference]: With dead ends: 41 [2018-12-24 13:59:41,007 INFO L226 Difference]: Without dead ends: 40 [2018-12-24 13:59:41,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-24 13:59:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-24 13:59:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2018-12-24 13:59:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-24 13:59:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 118 transitions. [2018-12-24 13:59:41,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 118 transitions. Word has length 4 [2018-12-24 13:59:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:41,019 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 118 transitions. [2018-12-24 13:59:41,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 13:59:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 118 transitions. [2018-12-24 13:59:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:41,020 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:41,021 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:41,021 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash 933712, now seen corresponding path program 2 times [2018-12-24 13:59:41,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:41,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:41,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:41,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:41,023 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:41,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:41,104 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:41,105 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 13:59:41,105 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 13:59:41,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:41,105 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:41,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 13:59:41,114 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 13:59:41,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-24 13:59:41,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 13:59:41,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:41,143 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 18 treesize of output 21 [2018-12-24 13:59:41,147 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 21 treesize of output 27 [2018-12-24 13:59:41,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-12-24 13:59:41,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,168 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 13:59:41,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 13:59:41,176 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,201 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,216 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,228 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,239 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:41,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:41,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:41,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:41,421 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,436 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,452 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,468 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,498 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. [2018-12-24 13:59:41,498 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:69, output treesize:66 [2018-12-24 13:59:41,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:41,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 13:59:41,560 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:41,957 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:41,957 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:42,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,085 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:42,087 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 79 [2018-12-24 13:59:42,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,118 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:42,119 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:44 [2018-12-24 13:59:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:42,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:42,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:42,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:42,198 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:42,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:42,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:42,199 INFO L87 Difference]: Start difference. First operand 33 states and 118 transitions. Second operand 8 states. [2018-12-24 13:59:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:42,607 INFO L93 Difference]: Finished difference Result 57 states and 149 transitions. [2018-12-24 13:59:42,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:42,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:42,609 INFO L225 Difference]: With dead ends: 57 [2018-12-24 13:59:42,609 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 13:59:42,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 13:59:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2018-12-24 13:59:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-24 13:59:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 117 transitions. [2018-12-24 13:59:42,620 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 117 transitions. Word has length 4 [2018-12-24 13:59:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:42,620 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 117 transitions. [2018-12-24 13:59:42,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 117 transitions. [2018-12-24 13:59:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:42,621 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:42,621 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:42,621 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:42,621 INFO L82 PathProgramCache]: Analyzing trace with hash 933340, now seen corresponding path program 1 times [2018-12-24 13:59:42,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:42,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:42,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 13:59:42,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:42,623 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:42,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:42,701 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:42,701 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:42,702 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [23] [2018-12-24 13:59:42,706 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:42,706 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:42,712 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:42,712 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:42,713 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:42,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:42,713 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:42,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:42,727 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:42,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:42,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 40 [2018-12-24 13:59:42,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 42 [2018-12-24 13:59:42,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:42,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:42,839 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,855 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,866 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,885 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 18 treesize of output 21 [2018-12-24 13:59:42,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 27 [2018-12-24 13:59:42,891 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 23 treesize of output 37 [2018-12-24 13:59:42,894 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 25 treesize of output 51 [2018-12-24 13:59:42,909 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:42,910 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,929 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,943 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,955 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,965 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:42,987 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:42,987 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:43,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 51 [2018-12-24 13:59:43,057 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,094 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. [2018-12-24 13:59:43,094 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:33 [2018-12-24 13:59:43,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2018-12-24 13:59:43,120 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,161 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:43,161 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:27 [2018-12-24 13:59:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:43,177 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:43,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:43,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 13:59:43,218 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:43,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:43,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:43,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-12-24 13:59:43,220 INFO L87 Difference]: Start difference. First operand 33 states and 117 transitions. Second operand 8 states. [2018-12-24 13:59:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:43,611 INFO L93 Difference]: Finished difference Result 61 states and 173 transitions. [2018-12-24 13:59:43,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 13:59:43,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:43,612 INFO L225 Difference]: With dead ends: 61 [2018-12-24 13:59:43,613 INFO L226 Difference]: Without dead ends: 60 [2018-12-24 13:59:43,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-24 13:59:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2018-12-24 13:59:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-24 13:59:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 135 transitions. [2018-12-24 13:59:43,626 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 135 transitions. Word has length 4 [2018-12-24 13:59:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:43,627 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 135 transitions. [2018-12-24 13:59:43,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 135 transitions. [2018-12-24 13:59:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:43,628 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:43,628 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:43,628 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 937744, now seen corresponding path program 1 times [2018-12-24 13:59:43,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:43,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:43,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:43,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:43,630 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:43,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:43,663 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:43,663 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:43,664 INFO L207 CegarAbsIntRunner]: [0], [14], [24], [25] [2018-12-24 13:59:43,664 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:43,665 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:43,672 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:43,676 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:43,676 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:43,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:43,677 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:43,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:43,689 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:43,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:43,721 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 18 treesize of output 21 [2018-12-24 13:59:43,760 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 21 treesize of output 23 [2018-12-24 13:59:43,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,776 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 23 treesize of output 33 [2018-12-24 13:59:43,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 13:59:43,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 13:59:43,803 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,834 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,849 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,860 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,872 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:43,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 13:59:43,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,912 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 36 treesize of output 49 [2018-12-24 13:59:43,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:43,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 13:59:44,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 13:59:44,009 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,025 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,041 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,060 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,152 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:44,152 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:61, output treesize:62 [2018-12-24 13:59:44,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:44,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 13:59:44,175 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:44,213 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:44,213 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:46 [2018-12-24 13:59:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:44,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:44,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:44,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:44,260 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:44,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:44,260 INFO L87 Difference]: Start difference. First operand 36 states and 135 transitions. Second operand 6 states. [2018-12-24 13:59:44,751 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-12-24 13:59:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:45,088 INFO L93 Difference]: Finished difference Result 53 states and 161 transitions. [2018-12-24 13:59:45,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:45,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 13:59:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:45,089 INFO L225 Difference]: With dead ends: 53 [2018-12-24 13:59:45,089 INFO L226 Difference]: Without dead ends: 52 [2018-12-24 13:59:45,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-24 13:59:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2018-12-24 13:59:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-24 13:59:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 141 transitions. [2018-12-24 13:59:45,101 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 141 transitions. Word has length 4 [2018-12-24 13:59:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:45,102 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 141 transitions. [2018-12-24 13:59:45,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 141 transitions. [2018-12-24 13:59:45,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 13:59:45,102 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:45,103 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 13:59:45,103 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash 937308, now seen corresponding path program 1 times [2018-12-24 13:59:45,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:45,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:45,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:45,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:45,104 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:45,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:45,241 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:45,242 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 13:59:45,242 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [23] [2018-12-24 13:59:45,244 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:45,244 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:45,247 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:45,248 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 2. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:45,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:45,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:45,248 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:45,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:45,259 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:45,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:45,288 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 18 treesize of output 21 [2018-12-24 13:59:45,291 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 21 treesize of output 27 [2018-12-24 13:59:45,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-12-24 13:59:45,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,305 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 25 treesize of output 51 [2018-12-24 13:59:45,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 13:59:45,315 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,342 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,394 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,406 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,415 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:45,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:45,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:45,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:45,560 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,575 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,591 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,607 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,681 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:45,682 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:69, output treesize:66 [2018-12-24 13:59:45,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,707 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 13:59:45,707 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,737 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:45,737 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:45,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:45,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 13:59:45,794 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:45,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:45,828 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2018-12-24 13:59:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:45,865 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:45,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:45,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:45,906 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:45,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:45,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:45,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:45,907 INFO L87 Difference]: Start difference. First operand 37 states and 141 transitions. Second operand 8 states. [2018-12-24 13:59:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:46,429 INFO L93 Difference]: Finished difference Result 69 states and 192 transitions. [2018-12-24 13:59:46,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:46,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 13:59:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:46,436 INFO L225 Difference]: With dead ends: 69 [2018-12-24 13:59:46,436 INFO L226 Difference]: Without dead ends: 68 [2018-12-24 13:59:46,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-24 13:59:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2018-12-24 13:59:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-24 13:59:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 153 transitions. [2018-12-24 13:59:46,448 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 153 transitions. Word has length 4 [2018-12-24 13:59:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:46,448 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 153 transitions. [2018-12-24 13:59:46,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 153 transitions. [2018-12-24 13:59:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 13:59:46,451 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:46,452 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-24 13:59:46,452 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash 29182896, now seen corresponding path program 2 times [2018-12-24 13:59:46,452 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:46,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:46,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:46,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:46,453 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 13:59:46,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:46,539 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:46,539 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 13:59:46,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 13:59:46,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:46,539 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:46,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 13:59:46,548 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 13:59:46,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 13:59:46,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 13:59:46,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:46,604 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 18 treesize of output 21 [2018-12-24 13:59:46,610 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 21 treesize of output 27 [2018-12-24 13:59:46,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,624 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 23 treesize of output 37 [2018-12-24 13:59:46,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,667 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 25 treesize of output 51 [2018-12-24 13:59:46,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,694 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 13:59:46,694 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:46,868 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:46,882 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:46,893 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:46,913 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:46,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:46,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:46,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:47,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,008 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 32 treesize of output 61 [2018-12-24 13:59:47,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:47,068 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,094 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,120 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,144 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,183 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:47,183 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:69, output treesize:66 [2018-12-24 13:59:47,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 13:59:47,230 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,278 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:47,278 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:47,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 78 [2018-12-24 13:59:47,330 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,375 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:47,376 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:50 [2018-12-24 13:59:47,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:47,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 13:59:47,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:47,450 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. [2018-12-24 13:59:47,450 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 13:59:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:47,468 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:47,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:47,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2018-12-24 13:59:47,505 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:47,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 13:59:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 13:59:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2018-12-24 13:59:47,506 INFO L87 Difference]: Start difference. First operand 39 states and 153 transitions. Second operand 9 states. [2018-12-24 13:59:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:47,850 INFO L93 Difference]: Finished difference Result 73 states and 219 transitions. [2018-12-24 13:59:47,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 13:59:47,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2018-12-24 13:59:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:47,852 INFO L225 Difference]: With dead ends: 73 [2018-12-24 13:59:47,852 INFO L226 Difference]: Without dead ends: 71 [2018-12-24 13:59:47,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-24 13:59:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 42. [2018-12-24 13:59:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-24 13:59:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 171 transitions. [2018-12-24 13:59:47,866 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 171 transitions. Word has length 5 [2018-12-24 13:59:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:47,866 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 171 transitions. [2018-12-24 13:59:47,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 13:59:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 171 transitions. [2018-12-24 13:59:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 13:59:47,867 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:47,867 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 13:59:47,868 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:47,868 INFO L82 PathProgramCache]: Analyzing trace with hash 29185378, now seen corresponding path program 1 times [2018-12-24 13:59:47,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:47,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:47,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 13:59:47,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:47,869 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:47,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:47,986 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:47,986 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 13:59:47,987 INFO L207 CegarAbsIntRunner]: [0], [18], [20], [24], [25] [2018-12-24 13:59:47,988 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:47,988 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:47,991 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:47,991 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:47,991 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:47,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:47,991 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:48,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:48,000 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:48,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:48,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 13:59:48,071 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 21 treesize of output 23 [2018-12-24 13:59:48,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,096 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 23 treesize of output 33 [2018-12-24 13:59:48,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,104 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 25 treesize of output 47 [2018-12-24 13:59:48,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 13:59:48,115 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,141 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,155 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,165 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,174 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 13:59:48,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 13:59:48,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 13:59:48,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 13:59:48,360 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,374 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,388 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,405 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,433 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:48,433 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 13:59:48,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 13:59:48,481 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,508 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:48,509 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 13:59:48,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:48,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 76 [2018-12-24 13:59:48,538 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:48,564 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:48,565 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:36 [2018-12-24 13:59:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:48,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:48,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:48,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 13:59:48,702 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:48,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 13:59:48,703 INFO L87 Difference]: Start difference. First operand 42 states and 171 transitions. Second operand 8 states. [2018-12-24 13:59:49,148 WARN L181 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2018-12-24 13:59:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:49,361 INFO L93 Difference]: Finished difference Result 84 states and 258 transitions. [2018-12-24 13:59:49,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 13:59:49,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 13:59:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:49,364 INFO L225 Difference]: With dead ends: 84 [2018-12-24 13:59:49,364 INFO L226 Difference]: Without dead ends: 78 [2018-12-24 13:59:49,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2018-12-24 13:59:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-24 13:59:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2018-12-24 13:59:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-24 13:59:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 218 transitions. [2018-12-24 13:59:49,383 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 218 transitions. Word has length 5 [2018-12-24 13:59:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:49,383 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 218 transitions. [2018-12-24 13:59:49,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 218 transitions. [2018-12-24 13:59:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 13:59:49,384 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:49,384 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 13:59:49,384 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:49,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:49,385 INFO L82 PathProgramCache]: Analyzing trace with hash 29184942, now seen corresponding path program 1 times [2018-12-24 13:59:49,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:49,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:49,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:49,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:49,386 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:49,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:49,547 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:49,547 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 13:59:49,548 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [20], [23] [2018-12-24 13:59:49,549 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:49,549 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:49,552 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:49,553 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 13:59:49,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:49,553 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:49,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:49,553 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:49,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:49,563 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:49,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:49,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 13:59:49,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 13:59:49,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-12-24 13:59:49,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,599 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 25 treesize of output 51 [2018-12-24 13:59:49,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:49,609 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,629 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,643 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,656 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,668 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,690 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 31 treesize of output 40 [2018-12-24 13:59:49,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,716 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 27 treesize of output 42 [2018-12-24 13:59:49,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:49,751 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,760 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,770 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:49,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:49,813 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:49,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:49,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 54 [2018-12-24 13:59:49,853 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 13:59:49,915 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2018-12-24 13:59:49,916 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:74 [2018-12-24 13:59:50,398 WARN L181 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-12-24 13:59:50,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:50,705 INFO L303 Elim1Store]: Index analysis took 302 ms [2018-12-24 13:59:51,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 80 [2018-12-24 13:59:51,039 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-24 13:59:51,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:51,753 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:51,754 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 45 treesize of output 51 [2018-12-24 13:59:51,754 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:51,868 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 11 dim-0 vars, and 5 xjuncts. [2018-12-24 13:59:51,868 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:96, output treesize:167 [2018-12-24 13:59:52,139 WARN L181 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2018-12-24 13:59:52,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,154 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:52,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 86 [2018-12-24 13:59:52,158 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2018-12-24 13:59:52,311 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,424 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:52,424 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 82 [2018-12-24 13:59:52,425 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,548 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:52,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 73 [2018-12-24 13:59:52,550 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,616 INFO L267 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 4 xjuncts. [2018-12-24 13:59:52,617 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:167, output treesize:121 [2018-12-24 13:59:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:52,738 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:52,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:52,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 13:59:52,817 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:52,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 13:59:52,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 13:59:52,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2018-12-24 13:59:52,818 INFO L87 Difference]: Start difference. First operand 48 states and 218 transitions. Second operand 10 states. [2018-12-24 13:59:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:53,679 INFO L93 Difference]: Finished difference Result 109 states and 322 transitions. [2018-12-24 13:59:53,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 13:59:53,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 13:59:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:53,682 INFO L225 Difference]: With dead ends: 109 [2018-12-24 13:59:53,682 INFO L226 Difference]: Without dead ends: 107 [2018-12-24 13:59:53,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2018-12-24 13:59:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-12-24 13:59:53,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 51. [2018-12-24 13:59:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-24 13:59:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 236 transitions. [2018-12-24 13:59:53,702 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 236 transitions. Word has length 5 [2018-12-24 13:59:53,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:53,702 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 236 transitions. [2018-12-24 13:59:53,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 13:59:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 236 transitions. [2018-12-24 13:59:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 13:59:53,703 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:53,703 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 13:59:53,704 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:53,704 INFO L82 PathProgramCache]: Analyzing trace with hash 29171924, now seen corresponding path program 1 times [2018-12-24 13:59:53,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:53,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:53,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:53,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:53,705 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 13:59:53,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:53,827 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:53,827 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 13:59:53,827 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [25] [2018-12-24 13:59:53,829 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:53,829 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:53,833 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:53,833 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:53,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:53,833 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:53,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:53,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:53,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:53,847 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:53,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:53,875 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 18 treesize of output 21 [2018-12-24 13:59:53,878 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 21 treesize of output 27 [2018-12-24 13:59:53,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,885 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 23 treesize of output 37 [2018-12-24 13:59:53,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,898 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 25 treesize of output 51 [2018-12-24 13:59:53,910 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:53,911 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,933 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,948 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,962 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,986 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 40 [2018-12-24 13:59:54,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,033 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 27 treesize of output 42 [2018-12-24 13:59:54,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:54,063 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,074 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,084 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:54,164 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:54,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,201 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 13:59:54,202 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,219 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:54,219 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2018-12-24 13:59:54,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 59 [2018-12-24 13:59:54,243 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,264 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:54,265 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:27 [2018-12-24 13:59:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:54,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:54,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:54,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:54,321 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:54,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:54,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:54,322 INFO L87 Difference]: Start difference. First operand 51 states and 236 transitions. Second operand 8 states. [2018-12-24 13:59:54,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:54,675 INFO L93 Difference]: Finished difference Result 77 states and 292 transitions. [2018-12-24 13:59:54,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:54,676 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 13:59:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:54,677 INFO L225 Difference]: With dead ends: 77 [2018-12-24 13:59:54,677 INFO L226 Difference]: Without dead ends: 76 [2018-12-24 13:59:54,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2018-12-24 13:59:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-24 13:59:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2018-12-24 13:59:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-24 13:59:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 261 transitions. [2018-12-24 13:59:54,698 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 261 transitions. Word has length 5 [2018-12-24 13:59:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:54,698 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 261 transitions. [2018-12-24 13:59:54,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 261 transitions. [2018-12-24 13:59:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 13:59:54,699 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:54,699 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 13:59:54,699 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:54,700 INFO L82 PathProgramCache]: Analyzing trace with hash 29175642, now seen corresponding path program 2 times [2018-12-24 13:59:54,700 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:54,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:54,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:54,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:54,701 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:55,053 WARN L181 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-12-24 13:59:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:55,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:55,097 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:55,097 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 13:59:55,097 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 13:59:55,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:55,097 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:55,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 13:59:55,106 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 13:59:55,115 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 13:59:55,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 13:59:55,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:55,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 13:59:55,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,167 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 13:59:55,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 13:59:55,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:55,251 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,265 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,281 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,297 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,319 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 18 treesize of output 21 [2018-12-24 13:59:55,322 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 21 treesize of output 27 [2018-12-24 13:59:55,324 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 23 treesize of output 37 [2018-12-24 13:59:55,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 13:59:55,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 13:59:55,330 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,353 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,365 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,377 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,386 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,415 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:55,415 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:69, output treesize:66 [2018-12-24 13:59:55,446 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 13:59:55,447 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,475 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:55,475 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 13:59:55,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,507 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:55,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 13:59:55,508 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,539 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:55,539 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:42 [2018-12-24 13:59:55,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,586 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 82 [2018-12-24 13:59:55,587 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,622 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:55,623 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2018-12-24 13:59:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:55,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:55,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:55,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 13:59:55,720 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:55,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 13:59:55,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 13:59:55,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:55,720 INFO L87 Difference]: Start difference. First operand 55 states and 261 transitions. Second operand 10 states. [2018-12-24 13:59:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:56,215 INFO L93 Difference]: Finished difference Result 88 states and 340 transitions. [2018-12-24 13:59:56,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 13:59:56,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 13:59:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:56,219 INFO L225 Difference]: With dead ends: 88 [2018-12-24 13:59:56,219 INFO L226 Difference]: Without dead ends: 83 [2018-12-24 13:59:56,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-12-24 13:59:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-24 13:59:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2018-12-24 13:59:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-24 13:59:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 273 transitions. [2018-12-24 13:59:56,238 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 273 transitions. Word has length 5 [2018-12-24 13:59:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:56,238 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 273 transitions. [2018-12-24 13:59:56,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 13:59:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 273 transitions. [2018-12-24 13:59:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 13:59:56,239 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:56,239 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 13:59:56,239 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:56,240 INFO L82 PathProgramCache]: Analyzing trace with hash 29179612, now seen corresponding path program 1 times [2018-12-24 13:59:56,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:56,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:56,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 13:59:56,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:56,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:56,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:56,321 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:56,321 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 13:59:56,322 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [25] [2018-12-24 13:59:56,322 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:56,323 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:56,326 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:56,326 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 13:59:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:56,326 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:56,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:56,326 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:56,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:56,338 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:56,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:56,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 13:59:56,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 13:59:56,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 13:59:56,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 13:59:56,409 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 46 [2018-12-24 13:59:56,409 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,425 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,438 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,448 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,458 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,476 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 26 treesize of output 25 [2018-12-24 13:59:56,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,489 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 22 treesize of output 38 [2018-12-24 13:59:56,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2018-12-24 13:59:56,522 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,530 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,539 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,557 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:56,557 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:44, output treesize:46 [2018-12-24 13:59:56,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2018-12-24 13:59:56,588 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:56,597 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2018-12-24 13:59:56,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,616 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 50 [2018-12-24 13:59:56,617 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,631 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:56,631 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:18 [2018-12-24 13:59:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:56,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:56,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:56,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 13:59:56,684 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:56,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 13:59:56,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 13:59:56,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 13:59:56,684 INFO L87 Difference]: Start difference. First operand 61 states and 273 transitions. Second operand 8 states. [2018-12-24 13:59:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:56,953 INFO L93 Difference]: Finished difference Result 81 states and 298 transitions. [2018-12-24 13:59:56,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 13:59:56,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 13:59:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:56,955 INFO L225 Difference]: With dead ends: 81 [2018-12-24 13:59:56,955 INFO L226 Difference]: Without dead ends: 80 [2018-12-24 13:59:56,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-24 13:59:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2018-12-24 13:59:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-24 13:59:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 273 transitions. [2018-12-24 13:59:56,972 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 273 transitions. Word has length 5 [2018-12-24 13:59:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:56,972 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 273 transitions. [2018-12-24 13:59:56,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 13:59:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 273 transitions. [2018-12-24 13:59:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 13:59:56,973 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:56,973 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 13:59:56,973 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:56,974 INFO L82 PathProgramCache]: Analyzing trace with hash 29179176, now seen corresponding path program 1 times [2018-12-24 13:59:56,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:56,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:56,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:56,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:56,975 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:57,502 WARN L181 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2018-12-24 13:59:57,927 WARN L181 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2018-12-24 13:59:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:57,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:57,948 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:57,948 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 13:59:57,949 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [23] [2018-12-24 13:59:57,950 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:57,950 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:57,953 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:57,953 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 13:59:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:57,954 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:57,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:57,954 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:57,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:57,966 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:57,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:58,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,014 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 31 treesize of output 40 [2018-12-24 13:59:58,148 WARN L181 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-12-24 13:59:58,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,153 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 27 treesize of output 42 [2018-12-24 13:59:58,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:58,192 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,202 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,211 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,227 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 18 treesize of output 21 [2018-12-24 13:59:58,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 13:59:58,232 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 23 treesize of output 37 [2018-12-24 13:59:58,235 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 25 treesize of output 51 [2018-12-24 13:59:58,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:58,242 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,258 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,272 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,283 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,293 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,314 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,315 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:58,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 13:59:58,361 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,378 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 13:59:58,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2018-12-24 13:59:58,406 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,429 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. [2018-12-24 13:59:58,429 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:27 [2018-12-24 13:59:58,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,461 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:58,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,463 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 76 [2018-12-24 13:59:58,463 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,487 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,487 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:25 [2018-12-24 13:59:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:58,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:58,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:58,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 13:59:58,581 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:58,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 13:59:58,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 13:59:58,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-12-24 13:59:58,582 INFO L87 Difference]: Start difference. First operand 61 states and 273 transitions. Second operand 10 states. [2018-12-24 13:59:59,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:59,053 INFO L93 Difference]: Finished difference Result 113 states and 415 transitions. [2018-12-24 13:59:59,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 13:59:59,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 13:59:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:59,056 INFO L225 Difference]: With dead ends: 113 [2018-12-24 13:59:59,056 INFO L226 Difference]: Without dead ends: 112 [2018-12-24 13:59:59,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2018-12-24 13:59:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-12-24 13:59:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 60. [2018-12-24 13:59:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-24 13:59:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 267 transitions. [2018-12-24 13:59:59,082 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 267 transitions. Word has length 5 [2018-12-24 13:59:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:59,083 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 267 transitions. [2018-12-24 13:59:59,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 13:59:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 267 transitions. [2018-12-24 13:59:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 13:59:59,083 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:59,083 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 13:59:59,084 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:59,084 INFO L82 PathProgramCache]: Analyzing trace with hash 29242478, now seen corresponding path program 1 times [2018-12-24 13:59:59,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:59,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:59,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:59,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:59,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:59,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:59,182 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:59,182 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 13:59:59,183 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [20], [23] [2018-12-24 13:59:59,186 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:59,186 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:59,189 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:59,189 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 13:59:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:59,190 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:59,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:59,190 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 13:59:59,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:59,212 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:59,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:59,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 13:59:59,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 13:59:59,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,244 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 23 treesize of output 37 [2018-12-24 13:59:59,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 13:59:59,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 13:59:59,292 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,316 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,332 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,343 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,354 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,376 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 31 treesize of output 40 [2018-12-24 13:59:59,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,418 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 27 treesize of output 42 [2018-12-24 13:59:59,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 13:59:59,451 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,463 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,473 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,494 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:59,494 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:52, output treesize:50 [2018-12-24 13:59:59,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 13:59:59,573 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 13:59:59,731 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 5 xjuncts. [2018-12-24 13:59:59,731 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:231 [2018-12-24 13:59:59,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 69 [2018-12-24 13:59:59,849 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,928 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 13:59:59,929 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 51 [2018-12-24 13:59:59,929 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 65 [2018-12-24 13:59:59,996 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,054 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2018-12-24 14:00:00,055 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:158, output treesize:96 [2018-12-24 14:00:00,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 79 [2018-12-24 14:00:00,168 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,251 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:00,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 77 [2018-12-24 14:00:00,252 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2018-12-24 14:00:00,323 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,367 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2018-12-24 14:00:00,368 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:130, output treesize:88 [2018-12-24 14:00:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:00,458 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:00,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:00,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-24 14:00:00,493 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:00,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:00,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:00,494 INFO L87 Difference]: Start difference. First operand 60 states and 267 transitions. Second operand 10 states. [2018-12-24 14:00:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:01,356 INFO L93 Difference]: Finished difference Result 137 states and 516 transitions. [2018-12-24 14:00:01,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:00:01,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:01,358 INFO L225 Difference]: With dead ends: 137 [2018-12-24 14:00:01,358 INFO L226 Difference]: Without dead ends: 136 [2018-12-24 14:00:01,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:00:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-12-24 14:00:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2018-12-24 14:00:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-24 14:00:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 468 transitions. [2018-12-24 14:00:01,403 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 468 transitions. Word has length 5 [2018-12-24 14:00:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:01,403 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 468 transitions. [2018-12-24 14:00:01,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 468 transitions. [2018-12-24 14:00:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:01,404 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:01,404 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:01,404 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,404 INFO L82 PathProgramCache]: Analyzing trace with hash 29231506, now seen corresponding path program 1 times [2018-12-24 14:00:01,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:01,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:01,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,406 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:01,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:01,492 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:01,493 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:01,493 INFO L207 CegarAbsIntRunner]: [0], [6], [20], [24], [25] [2018-12-24 14:00:01,493 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:01,493 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:01,495 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:01,496 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:01,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,497 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:01,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:01,497 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:01,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:01,506 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:01,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:01,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:01,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:01,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:01,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:01,664 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,679 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,695 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,712 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:00:01,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2018-12-24 14:00:01,739 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 23 treesize of output 37 [2018-12-24 14:00:01,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:00:01,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:00:01,745 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,770 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,784 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,795 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,804 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:01,839 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:69, output treesize:66 [2018-12-24 14:00:01,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:00:01,862 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:01,911 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:01,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,939 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:01,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:00:01,941 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,973 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:01,973 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2018-12-24 14:00:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:01,988 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:02,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:02,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:02,031 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:02,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:02,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:02,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:02,032 INFO L87 Difference]: Start difference. First operand 93 states and 468 transitions. Second operand 8 states. [2018-12-24 14:00:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:02,489 INFO L93 Difference]: Finished difference Result 120 states and 513 transitions. [2018-12-24 14:00:02,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:02,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:02,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:02,491 INFO L225 Difference]: With dead ends: 120 [2018-12-24 14:00:02,491 INFO L226 Difference]: Without dead ends: 119 [2018-12-24 14:00:02,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-24 14:00:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2018-12-24 14:00:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-12-24 14:00:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 486 transitions. [2018-12-24 14:00:02,534 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 486 transitions. Word has length 5 [2018-12-24 14:00:02,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:02,534 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 486 transitions. [2018-12-24 14:00:02,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 486 transitions. [2018-12-24 14:00:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:02,535 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:02,535 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:02,535 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 29248868, now seen corresponding path program 1 times [2018-12-24 14:00:02,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:02,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:02,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:02,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:02,536 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:02,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:02,597 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:02,597 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:02,597 INFO L207 CegarAbsIntRunner]: [0], [20], [24], [26], [27] [2018-12-24 14:00:02,598 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:02,598 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:02,601 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:02,602 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:02,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:02,602 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:02,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:02,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:02,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:02,611 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:02,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:02,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:00:02,622 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 21 treesize of output 23 [2018-12-24 14:00:02,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:00:02,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,643 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 25 treesize of output 47 [2018-12-24 14:00:02,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,656 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 27 treesize of output 62 [2018-12-24 14:00:02,656 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,689 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,705 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,718 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,731 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:02,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:02,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:02,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:02,869 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,883 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,897 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,913 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,940 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:02,941 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:61, output treesize:62 [2018-12-24 14:00:02,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:00:02,959 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:02,986 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:46 [2018-12-24 14:00:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:03,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:03,116 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:00:03,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:00:03,116 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:03,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:03,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:03,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:00:03,117 INFO L87 Difference]: Start difference. First operand 96 states and 486 transitions. Second operand 4 states. [2018-12-24 14:00:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:03,249 INFO L93 Difference]: Finished difference Result 105 states and 515 transitions. [2018-12-24 14:00:03,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:00:03,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-12-24 14:00:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:03,251 INFO L225 Difference]: With dead ends: 105 [2018-12-24 14:00:03,251 INFO L226 Difference]: Without dead ends: 104 [2018-12-24 14:00:03,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:00:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-12-24 14:00:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2018-12-24 14:00:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-12-24 14:00:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 513 transitions. [2018-12-24 14:00:03,300 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 513 transitions. Word has length 5 [2018-12-24 14:00:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:03,301 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 513 transitions. [2018-12-24 14:00:03,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 513 transitions. [2018-12-24 14:00:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:03,302 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:03,302 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:03,302 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:03,302 INFO L82 PathProgramCache]: Analyzing trace with hash 29235162, now seen corresponding path program 3 times [2018-12-24 14:00:03,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:03,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:03,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:03,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:03,303 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:03,868 WARN L181 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2018-12-24 14:00:04,247 WARN L181 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-12-24 14:00:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:04,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:04,273 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:04,273 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:00:04,273 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:00:04,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:04,273 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:04,283 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:00:04,283 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:00:04,287 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:00:04,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:00:04,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:04,307 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 18 treesize of output 21 [2018-12-24 14:00:04,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 14:00:04,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,321 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 23 treesize of output 37 [2018-12-24 14:00:04,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:00:04,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 14:00:04,334 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,351 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,365 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,377 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,467 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 40 [2018-12-24 14:00:04,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,514 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 27 treesize of output 42 [2018-12-24 14:00:04,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 14:00:04,546 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,556 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,564 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:04,586 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:52, output treesize:50 [2018-12-24 14:00:04,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:00:04,645 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 14:00:04,799 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 5 xjuncts. [2018-12-24 14:00:04,800 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:231 [2018-12-24 14:00:04,940 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2018-12-24 14:00:04,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 69 [2018-12-24 14:00:04,979 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,079 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:05,080 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 51 [2018-12-24 14:00:05,080 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 65 [2018-12-24 14:00:05,167 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,262 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 65 [2018-12-24 14:00:05,263 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,332 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2018-12-24 14:00:05,333 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:197, output treesize:121 [2018-12-24 14:00:05,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,408 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:05,409 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 82 [2018-12-24 14:00:05,409 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,511 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:05,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,513 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 76 [2018-12-24 14:00:05,514 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,600 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 55 treesize of output 53 [2018-12-24 14:00:05,601 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,680 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:05,681 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 67 [2018-12-24 14:00:05,681 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,744 INFO L267 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 4 xjuncts. [2018-12-24 14:00:05,744 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:167, output treesize:123 [2018-12-24 14:00:06,198 WARN L181 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2018-12-24 14:00:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:06,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:06,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:06,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:00:06,255 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:06,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:06,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:06,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:06,256 INFO L87 Difference]: Start difference. First operand 103 states and 513 transitions. Second operand 10 states. [2018-12-24 14:00:06,682 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2018-12-24 14:00:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:07,052 INFO L93 Difference]: Finished difference Result 131 states and 560 transitions. [2018-12-24 14:00:07,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:07,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:00:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:07,055 INFO L225 Difference]: With dead ends: 131 [2018-12-24 14:00:07,055 INFO L226 Difference]: Without dead ends: 130 [2018-12-24 14:00:07,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:00:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-12-24 14:00:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 41. [2018-12-24 14:00:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-24 14:00:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 140 transitions. [2018-12-24 14:00:07,078 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 140 transitions. Word has length 5 [2018-12-24 14:00:07,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:07,078 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 140 transitions. [2018-12-24 14:00:07,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:07,078 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 140 transitions. [2018-12-24 14:00:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:07,078 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:07,078 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:07,079 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:07,079 INFO L82 PathProgramCache]: Analyzing trace with hash 29239194, now seen corresponding path program 1 times [2018-12-24 14:00:07,079 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:07,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:07,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:00:07,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:07,080 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:07,282 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2018-12-24 14:00:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:07,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:07,298 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:07,298 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:07,298 INFO L207 CegarAbsIntRunner]: [0], [14], [20], [24], [25] [2018-12-24 14:00:07,299 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:07,299 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:07,302 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:07,302 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:07,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:07,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:07,303 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:07,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:07,314 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:07,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:07,323 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 18 treesize of output 21 [2018-12-24 14:00:07,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:00:07,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,331 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,331 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 23 treesize of output 33 [2018-12-24 14:00:07,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,339 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 25 treesize of output 47 [2018-12-24 14:00:07,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:00:07,348 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,371 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,385 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,395 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,405 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:07,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:07,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:07,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:07,519 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,566 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,584 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,607 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,638 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:07,639 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:00:07,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:00:07,671 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,706 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:07,707 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:00:07,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,754 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:07,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 76 [2018-12-24 14:00:07,755 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,794 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:07,794 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2018-12-24 14:00:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:07,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:07,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:07,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:07,906 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:07,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:07,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:07,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:07,906 INFO L87 Difference]: Start difference. First operand 41 states and 140 transitions. Second operand 8 states. [2018-12-24 14:00:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:08,328 INFO L93 Difference]: Finished difference Result 71 states and 187 transitions. [2018-12-24 14:00:08,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:08,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:08,329 INFO L225 Difference]: With dead ends: 71 [2018-12-24 14:00:08,329 INFO L226 Difference]: Without dead ends: 68 [2018-12-24 14:00:08,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-24 14:00:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2018-12-24 14:00:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-24 14:00:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 160 transitions. [2018-12-24 14:00:08,354 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 160 transitions. Word has length 5 [2018-12-24 14:00:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:08,354 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 160 transitions. [2018-12-24 14:00:08,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 160 transitions. [2018-12-24 14:00:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:08,355 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:08,355 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:08,355 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash 28818276, now seen corresponding path program 1 times [2018-12-24 14:00:08,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:08,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:08,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:08,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:08,356 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:08,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:08,446 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:08,447 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:08,447 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [25] [2018-12-24 14:00:08,448 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:08,448 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:08,451 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:08,451 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:08,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:08,451 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:08,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:08,451 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:08,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:08,461 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:08,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:08,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,489 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 31 treesize of output 40 [2018-12-24 14:00:08,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,514 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 27 treesize of output 42 [2018-12-24 14:00:08,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 14:00:08,550 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,560 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,570 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,587 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 18 treesize of output 21 [2018-12-24 14:00:08,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 27 [2018-12-24 14:00:08,593 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 23 treesize of output 37 [2018-12-24 14:00:08,614 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 25 treesize of output 51 [2018-12-24 14:00:08,652 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 14:00:08,652 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,671 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,686 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,698 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,708 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,731 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:08,731 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:52, output treesize:50 [2018-12-24 14:00:08,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,759 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 51 [2018-12-24 14:00:08,759 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,781 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. [2018-12-24 14:00:08,781 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:33 [2018-12-24 14:00:08,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,803 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 65 [2018-12-24 14:00:08,804 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,829 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:08,830 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:25 [2018-12-24 14:00:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:08,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:08,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:08,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:08,881 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:08,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:08,882 INFO L87 Difference]: Start difference. First operand 46 states and 160 transitions. Second operand 8 states. [2018-12-24 14:00:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:09,162 INFO L93 Difference]: Finished difference Result 73 states and 194 transitions. [2018-12-24 14:00:09,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:09,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:09,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:09,164 INFO L225 Difference]: With dead ends: 73 [2018-12-24 14:00:09,164 INFO L226 Difference]: Without dead ends: 72 [2018-12-24 14:00:09,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-24 14:00:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 47. [2018-12-24 14:00:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-24 14:00:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 166 transitions. [2018-12-24 14:00:09,202 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 166 transitions. Word has length 5 [2018-12-24 14:00:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:09,203 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 166 transitions. [2018-12-24 14:00:09,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 166 transitions. [2018-12-24 14:00:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:09,203 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:09,203 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:09,204 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash 28822120, now seen corresponding path program 1 times [2018-12-24 14:00:09,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:09,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:09,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:09,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:09,205 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:09,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:09,290 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:09,290 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:09,290 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [25] [2018-12-24 14:00:09,291 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:09,291 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:09,293 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:09,294 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:09,294 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:09,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:09,294 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:09,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:09,303 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:09,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:09,355 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 18 treesize of output 21 [2018-12-24 14:00:09,357 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 21 treesize of output 27 [2018-12-24 14:00:09,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,364 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 23 treesize of output 37 [2018-12-24 14:00:09,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:00:09,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 14:00:09,378 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,396 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,411 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,421 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,431 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,453 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 31 treesize of output 40 [2018-12-24 14:00:09,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,479 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 27 treesize of output 42 [2018-12-24 14:00:09,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 14:00:09,518 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,527 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,535 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,555 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:09,555 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:52, output treesize:50 [2018-12-24 14:00:09,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,592 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 51 [2018-12-24 14:00:09,593 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,612 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:09,612 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2018-12-24 14:00:09,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,635 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:09,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2018-12-24 14:00:09,637 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,654 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:09,654 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:29 [2018-12-24 14:00:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:09,671 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:09,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:09,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2018-12-24 14:00:09,716 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:09,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:00:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:00:09,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:09,717 INFO L87 Difference]: Start difference. First operand 47 states and 166 transitions. Second operand 9 states. [2018-12-24 14:00:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:11,954 INFO L93 Difference]: Finished difference Result 66 states and 193 transitions. [2018-12-24 14:00:11,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:11,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2018-12-24 14:00:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:11,956 INFO L225 Difference]: With dead ends: 66 [2018-12-24 14:00:11,956 INFO L226 Difference]: Without dead ends: 65 [2018-12-24 14:00:11,957 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-24 14:00:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2018-12-24 14:00:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-24 14:00:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 172 transitions. [2018-12-24 14:00:11,996 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 172 transitions. Word has length 5 [2018-12-24 14:00:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:11,996 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 172 transitions. [2018-12-24 14:00:11,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:00:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 172 transitions. [2018-12-24 14:00:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:11,997 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:11,997 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:11,997 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:11,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash 28950958, now seen corresponding path program 1 times [2018-12-24 14:00:11,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:11,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:11,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:11,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:11,999 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:12,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:00:12,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-24 14:00:12,166 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:12,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:00:12,166 INFO L87 Difference]: Start difference. First operand 48 states and 172 transitions. Second operand 4 states. [2018-12-24 14:00:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:12,230 INFO L93 Difference]: Finished difference Result 54 states and 182 transitions. [2018-12-24 14:00:12,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:00:12,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-12-24 14:00:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:12,231 INFO L225 Difference]: With dead ends: 54 [2018-12-24 14:00:12,231 INFO L226 Difference]: Without dead ends: 51 [2018-12-24 14:00:12,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:00:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-24 14:00:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-12-24 14:00:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-24 14:00:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 175 transitions. [2018-12-24 14:00:12,265 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 175 transitions. Word has length 5 [2018-12-24 14:00:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:12,265 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 175 transitions. [2018-12-24 14:00:12,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 175 transitions. [2018-12-24 14:00:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:00:12,266 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:12,266 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:00:12,266 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:12,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:12,267 INFO L82 PathProgramCache]: Analyzing trace with hash 28941284, now seen corresponding path program 1 times [2018-12-24 14:00:12,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:12,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:12,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:12,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:12,268 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:12,487 WARN L181 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-12-24 14:00:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:12,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:12,657 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:12,657 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:00:12,657 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [24], [25] [2018-12-24 14:00:12,658 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:12,658 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:12,660 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:12,660 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:12,660 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:12,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:12,660 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:12,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:12,671 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:12,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:12,702 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 26 treesize of output 25 [2018-12-24 14:00:12,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,749 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 22 treesize of output 38 [2018-12-24 14:00:12,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:12,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2018-12-24 14:00:12,795 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:12,809 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:12,824 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:12,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:00:12,848 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 21 treesize of output 23 [2018-12-24 14:00:12,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:00:12,856 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 25 treesize of output 47 [2018-12-24 14:00:12,866 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 46 [2018-12-24 14:00:12,867 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:12,898 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:12,908 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:12,917 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:12,926 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:12,944 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:12,944 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:44, output treesize:46 [2018-12-24 14:00:13,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,012 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 51 [2018-12-24 14:00:13,013 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:13,066 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:13,066 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:62 [2018-12-24 14:00:13,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,098 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 50 [2018-12-24 14:00:13,098 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,114 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:13,114 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:18 [2018-12-24 14:00:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:13,126 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:13,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:13,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:13,158 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:13,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:13,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:13,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:13,158 INFO L87 Difference]: Start difference. First operand 47 states and 175 transitions. Second operand 8 states. [2018-12-24 14:00:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:13,399 INFO L93 Difference]: Finished difference Result 83 states and 276 transitions. [2018-12-24 14:00:13,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:13,399 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:00:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:13,400 INFO L225 Difference]: With dead ends: 83 [2018-12-24 14:00:13,400 INFO L226 Difference]: Without dead ends: 82 [2018-12-24 14:00:13,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-24 14:00:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2018-12-24 14:00:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-24 14:00:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 241 transitions. [2018-12-24 14:00:13,446 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 241 transitions. Word has length 5 [2018-12-24 14:00:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:13,447 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 241 transitions. [2018-12-24 14:00:13,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 241 transitions. [2018-12-24 14:00:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:13,447 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:13,447 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:00:13,448 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:13,448 INFO L82 PathProgramCache]: Analyzing trace with hash 904687194, now seen corresponding path program 1 times [2018-12-24 14:00:13,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:13,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:13,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:13,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:13,449 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:13,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:13,553 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:13,553 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:13,553 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [26], [27] [2018-12-24 14:00:13,554 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:13,554 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:13,556 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:13,557 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:13,557 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:13,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:13,558 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:13,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:13,572 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:13,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:13,596 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 26 treesize of output 25 [2018-12-24 14:00:13,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 38 [2018-12-24 14:00:13,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2018-12-24 14:00:13,667 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,677 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,688 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,705 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 18 treesize of output 21 [2018-12-24 14:00:13,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:00:13,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:00:13,718 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 25 treesize of output 47 [2018-12-24 14:00:13,724 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 46 [2018-12-24 14:00:13,725 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,740 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,752 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,761 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,770 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,788 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:13,789 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:44, output treesize:46 [2018-12-24 14:00:13,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,816 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2018-12-24 14:00:13,816 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,825 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:13,826 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2018-12-24 14:00:13,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:13,843 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 40 [2018-12-24 14:00:13,843 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:13,855 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:13,856 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:20 [2018-12-24 14:00:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:13,871 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:13,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:13,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:13,908 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:13,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:13,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:13,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:13,909 INFO L87 Difference]: Start difference. First operand 58 states and 241 transitions. Second operand 8 states. [2018-12-24 14:00:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:14,320 INFO L93 Difference]: Finished difference Result 86 states and 325 transitions. [2018-12-24 14:00:14,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:14,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:00:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:14,321 INFO L225 Difference]: With dead ends: 86 [2018-12-24 14:00:14,321 INFO L226 Difference]: Without dead ends: 85 [2018-12-24 14:00:14,322 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-24 14:00:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2018-12-24 14:00:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-24 14:00:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 289 transitions. [2018-12-24 14:00:14,398 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 289 transitions. Word has length 6 [2018-12-24 14:00:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:14,398 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 289 transitions. [2018-12-24 14:00:14,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 289 transitions. [2018-12-24 14:00:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:14,399 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:14,399 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:14,400 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 904729414, now seen corresponding path program 1 times [2018-12-24 14:00:14,400 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:14,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:14,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:14,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:14,401 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:14,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:14,471 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:14,471 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:14,471 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [20], [24], [25] [2018-12-24 14:00:14,472 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:14,473 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:14,475 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:14,475 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:14,475 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:14,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:14,476 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:14,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:14,491 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:14,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:14,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:14,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:14,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:14,742 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-12-24 14:00:14,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:14,752 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:14,767 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:14,782 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:14,798 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:14,822 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 18 treesize of output 21 [2018-12-24 14:00:14,824 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 21 treesize of output 27 [2018-12-24 14:00:14,826 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 23 treesize of output 37 [2018-12-24 14:00:14,829 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 25 treesize of output 51 [2018-12-24 14:00:14,832 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:00:14,833 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:14,856 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:14,870 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:14,880 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:14,890 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:14,919 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:14,919 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:69, output treesize:66 [2018-12-24 14:00:14,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:14,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:00:14,976 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:15,023 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:15,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 14:00:15,056 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,086 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:15,086 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2018-12-24 14:00:15,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,122 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:15,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 94 [2018-12-24 14:00:15,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,157 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:15,157 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2018-12-24 14:00:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:15,214 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:15,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:15,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:15,268 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:15,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:15,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:15,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:15,269 INFO L87 Difference]: Start difference. First operand 66 states and 289 transitions. Second operand 10 states. [2018-12-24 14:00:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:15,871 INFO L93 Difference]: Finished difference Result 100 states and 357 transitions. [2018-12-24 14:00:15,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:15,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:00:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:15,873 INFO L225 Difference]: With dead ends: 100 [2018-12-24 14:00:15,873 INFO L226 Difference]: Without dead ends: 99 [2018-12-24 14:00:15,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-24 14:00:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 68. [2018-12-24 14:00:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-24 14:00:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 301 transitions. [2018-12-24 14:00:15,960 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 301 transitions. Word has length 6 [2018-12-24 14:00:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:15,960 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 301 transitions. [2018-12-24 14:00:15,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 301 transitions. [2018-12-24 14:00:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:15,960 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:15,960 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:15,961 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash 904737102, now seen corresponding path program 1 times [2018-12-24 14:00:15,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:15,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:15,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:15,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:15,962 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:16,122 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:00:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:16,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:16,355 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:16,355 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:16,355 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [20], [24], [25] [2018-12-24 14:00:16,356 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:16,356 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:16,359 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:16,359 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:16,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:16,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:16,360 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:16,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:16,368 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:16,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:16,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:16,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:16,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:16,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:16,488 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,506 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,523 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,540 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,561 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 18 treesize of output 21 [2018-12-24 14:00:16,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2018-12-24 14:00:16,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:00:16,570 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 25 treesize of output 47 [2018-12-24 14:00:16,572 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 27 treesize of output 62 [2018-12-24 14:00:16,573 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,593 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,605 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,614 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,624 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,651 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:16,651 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:00:16,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:00:16,720 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:16,737 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:00:16,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 59 [2018-12-24 14:00:16,767 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,789 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:16,790 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:27 [2018-12-24 14:00:16,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,820 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:16,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2018-12-24 14:00:16,822 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:16,845 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2018-12-24 14:00:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:16,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:16,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:16,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:16,915 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:16,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:16,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:16,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:16,915 INFO L87 Difference]: Start difference. First operand 68 states and 301 transitions. Second operand 10 states. [2018-12-24 14:00:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:17,393 INFO L93 Difference]: Finished difference Result 104 states and 381 transitions. [2018-12-24 14:00:17,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:17,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:00:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:17,395 INFO L225 Difference]: With dead ends: 104 [2018-12-24 14:00:17,395 INFO L226 Difference]: Without dead ends: 103 [2018-12-24 14:00:17,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-24 14:00:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2018-12-24 14:00:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-24 14:00:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 337 transitions. [2018-12-24 14:00:17,513 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 337 transitions. Word has length 6 [2018-12-24 14:00:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:17,513 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 337 transitions. [2018-12-24 14:00:17,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 337 transitions. [2018-12-24 14:00:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:17,514 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:17,514 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:17,514 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:17,515 INFO L82 PathProgramCache]: Analyzing trace with hash 904320028, now seen corresponding path program 1 times [2018-12-24 14:00:17,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:17,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:17,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:17,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:17,516 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:17,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:17,591 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:17,591 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:17,591 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [25] [2018-12-24 14:00:17,592 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:17,593 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:17,595 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:17,596 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:17,596 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:17,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:17,596 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:17,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:17,611 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:17,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:17,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,637 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 31 treesize of output 40 [2018-12-24 14:00:17,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 42 [2018-12-24 14:00:17,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 14:00:17,695 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,705 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,714 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,729 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 18 treesize of output 21 [2018-12-24 14:00:17,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 14:00:17,733 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 23 treesize of output 37 [2018-12-24 14:00:17,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:00:17,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 14:00:17,741 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,757 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,783 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,797 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,808 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,831 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:17,832 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:52, output treesize:50 [2018-12-24 14:00:17,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,886 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:00:17,887 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,908 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. [2018-12-24 14:00:17,908 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:00:17,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 59 [2018-12-24 14:00:17,941 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,962 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:17,962 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:27 [2018-12-24 14:00:17,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,001 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:18,002 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2018-12-24 14:00:18,002 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,027 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:18,027 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2018-12-24 14:00:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:18,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:18,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:18,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:18,100 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:18,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:18,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:18,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:18,101 INFO L87 Difference]: Start difference. First operand 74 states and 337 transitions. Second operand 10 states. [2018-12-24 14:00:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:18,686 INFO L93 Difference]: Finished difference Result 107 states and 399 transitions. [2018-12-24 14:00:18,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:18,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:00:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:18,688 INFO L225 Difference]: With dead ends: 107 [2018-12-24 14:00:18,688 INFO L226 Difference]: Without dead ends: 106 [2018-12-24 14:00:18,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-12-24 14:00:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2018-12-24 14:00:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-24 14:00:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 337 transitions. [2018-12-24 14:00:18,800 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 337 transitions. Word has length 6 [2018-12-24 14:00:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:18,800 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 337 transitions. [2018-12-24 14:00:18,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 337 transitions. [2018-12-24 14:00:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:18,801 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:18,801 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:18,801 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:18,801 INFO L82 PathProgramCache]: Analyzing trace with hash 906534236, now seen corresponding path program 1 times [2018-12-24 14:00:18,801 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:18,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:18,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:18,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:18,802 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:18,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:18,885 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:18,885 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:18,886 INFO L207 CegarAbsIntRunner]: [0], [18], [20], [24], [26], [27] [2018-12-24 14:00:18,887 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:18,887 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:18,890 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:18,890 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:18,890 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:18,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:18,890 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:18,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:18,902 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:18,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:18,910 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 18 treesize of output 21 [2018-12-24 14:00:18,915 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 21 treesize of output 23 [2018-12-24 14:00:18,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,942 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,942 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 23 treesize of output 33 [2018-12-24 14:00:18,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,955 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 25 treesize of output 47 [2018-12-24 14:00:18,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,967 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 27 treesize of output 62 [2018-12-24 14:00:18,968 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,991 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,004 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,013 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,023 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:19,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:19,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:19,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:19,137 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,153 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,167 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,182 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,226 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:19,227 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:00:19,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 51 [2018-12-24 14:00:19,260 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,278 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:19,278 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2018-12-24 14:00:19,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:19,301 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:19,320 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:25 [2018-12-24 14:00:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:19,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:19,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:19,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:19,376 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:19,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:19,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:19,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:19,376 INFO L87 Difference]: Start difference. First operand 74 states and 337 transitions. Second operand 8 states. [2018-12-24 14:00:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:19,755 INFO L93 Difference]: Finished difference Result 100 states and 371 transitions. [2018-12-24 14:00:19,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:19,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:00:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:19,757 INFO L225 Difference]: With dead ends: 100 [2018-12-24 14:00:19,757 INFO L226 Difference]: Without dead ends: 98 [2018-12-24 14:00:19,758 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-24 14:00:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2018-12-24 14:00:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-12-24 14:00:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 343 transitions. [2018-12-24 14:00:19,871 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 343 transitions. Word has length 6 [2018-12-24 14:00:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:19,872 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 343 transitions. [2018-12-24 14:00:19,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 343 transitions. [2018-12-24 14:00:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:19,872 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:19,872 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:19,872 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash 906163226, now seen corresponding path program 1 times [2018-12-24 14:00:19,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:19,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:19,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:19,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:19,874 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:19,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:19,996 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:19,996 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:19,996 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [20], [24], [25] [2018-12-24 14:00:19,997 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:19,997 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:19,999 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:19,999 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:20,000 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:20,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:20,000 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:20,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:20,010 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:20,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:20,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,034 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 31 treesize of output 40 [2018-12-24 14:00:20,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,066 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 27 treesize of output 42 [2018-12-24 14:00:20,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 14:00:20,100 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,111 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,123 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,140 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 18 treesize of output 21 [2018-12-24 14:00:20,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 14:00:20,145 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 23 treesize of output 37 [2018-12-24 14:00:20,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:00:20,151 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 14:00:20,152 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,169 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,182 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,192 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,214 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,235 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. [2018-12-24 14:00:20,235 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:52, output treesize:50 [2018-12-24 14:00:20,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:00:20,297 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 14:00:20,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 5 xjuncts. [2018-12-24 14:00:20,446 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:231 [2018-12-24 14:00:20,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,537 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 51 treesize of output 65 [2018-12-24 14:00:20,538 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,617 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:20,618 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 65 [2018-12-24 14:00:20,619 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,688 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:20,689 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 63 [2018-12-24 14:00:20,690 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,739 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2018-12-24 14:00:20,739 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:158, output treesize:92 [2018-12-24 14:00:20,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 69 [2018-12-24 14:00:20,800 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,865 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:20,866 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 39 treesize of output 53 [2018-12-24 14:00:20,867 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,924 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 39 treesize of output 65 [2018-12-24 14:00:20,925 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,974 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2018-12-24 14:00:20,974 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:122, output treesize:84 [2018-12-24 14:00:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:21,026 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:21,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:21,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:21,105 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:21,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:21,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:21,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:21,105 INFO L87 Difference]: Start difference. First operand 75 states and 343 transitions. Second operand 10 states. [2018-12-24 14:00:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:22,020 INFO L93 Difference]: Finished difference Result 124 states and 454 transitions. [2018-12-24 14:00:22,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:22,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:00:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:22,022 INFO L225 Difference]: With dead ends: 124 [2018-12-24 14:00:22,022 INFO L226 Difference]: Without dead ends: 123 [2018-12-24 14:00:22,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:00:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-24 14:00:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 78. [2018-12-24 14:00:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-24 14:00:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 361 transitions. [2018-12-24 14:00:22,152 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 361 transitions. Word has length 6 [2018-12-24 14:00:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:22,152 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 361 transitions. [2018-12-24 14:00:22,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 361 transitions. [2018-12-24 14:00:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:22,153 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:22,153 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:22,153 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash 906167070, now seen corresponding path program 1 times [2018-12-24 14:00:22,153 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:22,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:22,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:22,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:22,154 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:22,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:22,296 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:22,296 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:22,296 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [20], [24], [25] [2018-12-24 14:00:22,297 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:22,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:22,300 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:22,300 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:22,301 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:22,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:22,301 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:22,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:22,310 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:22,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:22,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:00:22,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 14:00:22,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-12-24 14:00:22,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:00:22,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:00:22,360 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,395 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,412 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,425 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,436 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:22,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:22,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:22,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:22,607 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,623 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,638 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,653 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,681 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:22,682 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:69, output treesize:66 [2018-12-24 14:00:22,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:00:22,713 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,740 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:22,740 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:22,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,930 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:22,930 INFO L303 Elim1Store]: Index analysis took 164 ms [2018-12-24 14:00:22,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:00:22,931 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,959 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:22,959 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2018-12-24 14:00:22,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,988 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:22,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:00:22,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,019 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. [2018-12-24 14:00:23,020 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:42 [2018-12-24 14:00:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:25,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:25,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:25,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2018-12-24 14:00:25,102 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:25,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:00:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:00:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=98, Unknown=1, NotChecked=0, Total=156 [2018-12-24 14:00:25,103 INFO L87 Difference]: Start difference. First operand 78 states and 361 transitions. Second operand 9 states. [2018-12-24 14:00:25,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:25,651 INFO L93 Difference]: Finished difference Result 114 states and 434 transitions. [2018-12-24 14:00:25,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:25,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-24 14:00:25,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:25,653 INFO L225 Difference]: With dead ends: 114 [2018-12-24 14:00:25,653 INFO L226 Difference]: Without dead ends: 113 [2018-12-24 14:00:25,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=87, Invalid=152, Unknown=1, NotChecked=0, Total=240 [2018-12-24 14:00:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-24 14:00:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2018-12-24 14:00:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-24 14:00:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 397 transitions. [2018-12-24 14:00:25,816 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 397 transitions. Word has length 6 [2018-12-24 14:00:25,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:25,817 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 397 transitions. [2018-12-24 14:00:25,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:00:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 397 transitions. [2018-12-24 14:00:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:25,817 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:25,817 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:25,817 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:25,818 INFO L82 PathProgramCache]: Analyzing trace with hash 906278546, now seen corresponding path program 2 times [2018-12-24 14:00:25,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:25,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:25,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:25,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:25,819 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:25,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:25,948 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:25,948 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:00:25,948 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:00:25,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:25,949 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:25,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:00:25,959 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:00:25,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:00:25,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:00:25,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:25,986 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 18 treesize of output 21 [2018-12-24 14:00:25,989 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 21 treesize of output 27 [2018-12-24 14:00:25,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,995 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 23 treesize of output 37 [2018-12-24 14:00:25,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,002 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 25 treesize of output 51 [2018-12-24 14:00:26,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:00:26,009 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,036 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,051 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,063 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,073 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:26,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:26,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:26,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:26,213 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,229 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,243 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,259 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,287 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:26,288 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:69, output treesize:66 [2018-12-24 14:00:26,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:00:26,312 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,339 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:26,340 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:26,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:00:26,366 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,398 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:26,398 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2018-12-24 14:00:26,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,428 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:26,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:00:26,429 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:26,460 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:26,461 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2018-12-24 14:00:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:26,481 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:26,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:26,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:00:26,526 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:26,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:26,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:26,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:26,526 INFO L87 Difference]: Start difference. First operand 84 states and 397 transitions. Second operand 10 states. [2018-12-24 14:00:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:27,106 INFO L93 Difference]: Finished difference Result 164 states and 664 transitions. [2018-12-24 14:00:27,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:00:27,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:00:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:27,108 INFO L225 Difference]: With dead ends: 164 [2018-12-24 14:00:27,108 INFO L226 Difference]: Without dead ends: 163 [2018-12-24 14:00:27,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:27,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-24 14:00:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 117. [2018-12-24 14:00:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-12-24 14:00:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 595 transitions. [2018-12-24 14:00:27,355 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 595 transitions. Word has length 6 [2018-12-24 14:00:27,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:27,355 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 595 transitions. [2018-12-24 14:00:27,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 595 transitions. [2018-12-24 14:00:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:27,356 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:27,356 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:27,356 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:27,356 INFO L82 PathProgramCache]: Analyzing trace with hash 906295908, now seen corresponding path program 1 times [2018-12-24 14:00:27,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:27,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:27,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:00:27,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:27,357 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:27,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:27,462 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:27,462 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:27,463 INFO L207 CegarAbsIntRunner]: [0], [10], [20], [24], [26], [27] [2018-12-24 14:00:27,463 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:27,463 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:27,465 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:27,465 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:27,465 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:27,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:27,465 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:27,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:27,476 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:27,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:27,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:27,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:27,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:27,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:27,581 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,596 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,608 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,624 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,644 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 18 treesize of output 21 [2018-12-24 14:00:27,648 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 21 treesize of output 23 [2018-12-24 14:00:27,650 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 23 treesize of output 33 [2018-12-24 14:00:27,653 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 25 treesize of output 47 [2018-12-24 14:00:27,656 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 27 treesize of output 62 [2018-12-24 14:00:27,657 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,677 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,687 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,696 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,706 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,732 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:27,732 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:00:27,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,756 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:00:27,756 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,781 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. [2018-12-24 14:00:27,781 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:00:27,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:00:27,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:27,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:27,912 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:72 [2018-12-24 14:00:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:27,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:27,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:27,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:27,983 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:27,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:27,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:27,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:27,984 INFO L87 Difference]: Start difference. First operand 117 states and 595 transitions. Second operand 8 states. [2018-12-24 14:00:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:28,514 INFO L93 Difference]: Finished difference Result 160 states and 722 transitions. [2018-12-24 14:00:28,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:28,515 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:00:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:28,517 INFO L225 Difference]: With dead ends: 160 [2018-12-24 14:00:28,517 INFO L226 Difference]: Without dead ends: 159 [2018-12-24 14:00:28,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-12-24 14:00:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2018-12-24 14:00:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-24 14:00:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 697 transitions. [2018-12-24 14:00:28,945 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 697 transitions. Word has length 6 [2018-12-24 14:00:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:28,945 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 697 transitions. [2018-12-24 14:00:28,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:28,946 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 697 transitions. [2018-12-24 14:00:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:28,946 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:28,947 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:28,947 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:28,947 INFO L82 PathProgramCache]: Analyzing trace with hash 893604942, now seen corresponding path program 1 times [2018-12-24 14:00:28,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:28,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:28,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:28,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:28,948 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:29,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:29,036 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:29,036 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:29,036 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [26], [27] [2018-12-24 14:00:29,037 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:29,037 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:29,039 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:29,040 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:29,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:29,040 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:29,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:29,040 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:29,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:29,050 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:29,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:29,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:00:29,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:00:29,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,071 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 23 treesize of output 33 [2018-12-24 14:00:29,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,082 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 25 treesize of output 47 [2018-12-24 14:00:29,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 46 [2018-12-24 14:00:29,096 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,113 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,126 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,136 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,146 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2018-12-24 14:00:29,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,188 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 22 treesize of output 38 [2018-12-24 14:00:29,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2018-12-24 14:00:29,215 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,223 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,232 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,250 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:29,250 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:44, output treesize:46 [2018-12-24 14:00:29,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,282 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2018-12-24 14:00:29,282 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,291 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:29,292 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2018-12-24 14:00:29,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:00:29,313 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,326 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:29,326 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2018-12-24 14:00:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:29,339 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:29,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:29,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:29,376 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:29,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:29,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:29,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:29,377 INFO L87 Difference]: Start difference. First operand 134 states and 697 transitions. Second operand 8 states. [2018-12-24 14:00:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:30,192 INFO L93 Difference]: Finished difference Result 175 states and 783 transitions. [2018-12-24 14:00:30,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:30,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:00:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:30,195 INFO L225 Difference]: With dead ends: 175 [2018-12-24 14:00:30,195 INFO L226 Difference]: Without dead ends: 174 [2018-12-24 14:00:30,195 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-12-24 14:00:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 132. [2018-12-24 14:00:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-12-24 14:00:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 685 transitions. [2018-12-24 14:00:30,436 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 685 transitions. Word has length 6 [2018-12-24 14:00:30,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:30,436 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 685 transitions. [2018-12-24 14:00:30,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 685 transitions. [2018-12-24 14:00:30,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:30,437 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:30,437 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:30,437 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash 893366614, now seen corresponding path program 1 times [2018-12-24 14:00:30,437 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:30,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:30,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:30,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:30,438 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:00:30,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:00:30,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-24 14:00:30,550 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:30,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-24 14:00:30,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-24 14:00:30,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:00:30,551 INFO L87 Difference]: Start difference. First operand 132 states and 685 transitions. Second operand 5 states. [2018-12-24 14:00:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:30,919 INFO L93 Difference]: Finished difference Result 185 states and 858 transitions. [2018-12-24 14:00:30,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:30,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-12-24 14:00:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:30,921 INFO L225 Difference]: With dead ends: 185 [2018-12-24 14:00:30,921 INFO L226 Difference]: Without dead ends: 184 [2018-12-24 14:00:30,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-24 14:00:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-12-24 14:00:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 132. [2018-12-24 14:00:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-12-24 14:00:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 685 transitions. [2018-12-24 14:00:31,182 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 685 transitions. Word has length 6 [2018-12-24 14:00:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:31,182 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 685 transitions. [2018-12-24 14:00:31,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-24 14:00:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 685 transitions. [2018-12-24 14:00:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:31,183 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:31,183 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:31,183 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:31,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:31,183 INFO L82 PathProgramCache]: Analyzing trace with hash 897299026, now seen corresponding path program 1 times [2018-12-24 14:00:31,184 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:31,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:31,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:31,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:31,185 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:31,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:31,236 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:31,236 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:31,236 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [26], [27] [2018-12-24 14:00:31,237 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:31,237 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:31,239 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:31,239 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:31,239 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:31,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:31,239 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:31,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:31,247 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:31,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:31,255 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 26 treesize of output 25 [2018-12-24 14:00:31,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,277 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 22 treesize of output 38 [2018-12-24 14:00:31,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2018-12-24 14:00:31,306 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,315 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,324 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:00:31,340 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 21 treesize of output 23 [2018-12-24 14:00:31,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:00:31,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:00:31,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 46 [2018-12-24 14:00:31,352 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,366 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,378 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,387 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,396 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,414 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:31,414 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:44, output treesize:46 [2018-12-24 14:00:31,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,444 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2018-12-24 14:00:31,444 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,455 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:31,456 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2018-12-24 14:00:31,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,474 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:31,474 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 41 [2018-12-24 14:00:31,475 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,485 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. [2018-12-24 14:00:31,486 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:22 [2018-12-24 14:00:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:31,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:31,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:31,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:31,536 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:31,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:31,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:31,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:31,537 INFO L87 Difference]: Start difference. First operand 132 states and 685 transitions. Second operand 8 states. [2018-12-24 14:00:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:32,009 INFO L93 Difference]: Finished difference Result 142 states and 698 transitions. [2018-12-24 14:00:32,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:32,009 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:00:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:32,011 INFO L225 Difference]: With dead ends: 142 [2018-12-24 14:00:32,012 INFO L226 Difference]: Without dead ends: 141 [2018-12-24 14:00:32,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-12-24 14:00:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 130. [2018-12-24 14:00:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-12-24 14:00:32,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 682 transitions. [2018-12-24 14:00:32,272 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 682 transitions. Word has length 6 [2018-12-24 14:00:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:32,273 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 682 transitions. [2018-12-24 14:00:32,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 682 transitions. [2018-12-24 14:00:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:32,273 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:32,273 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:00:32,274 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash 897354700, now seen corresponding path program 1 times [2018-12-24 14:00:32,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:32,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:32,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:32,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:32,275 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:32,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:32,347 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:32,347 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:32,347 INFO L207 CegarAbsIntRunner]: [0], [10], [20], [24], [25] [2018-12-24 14:00:32,348 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:32,348 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:32,350 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:32,351 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 2. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:32,351 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:32,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:32,351 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:32,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:32,360 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:32,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:32,371 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 18 treesize of output 21 [2018-12-24 14:00:32,377 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 21 treesize of output 23 [2018-12-24 14:00:32,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,381 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,381 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 23 treesize of output 33 [2018-12-24 14:00:32,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,390 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 25 treesize of output 47 [2018-12-24 14:00:32,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:00:32,398 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,428 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,440 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,451 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,461 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:32,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:32,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:32,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:32,574 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,588 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,602 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,617 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,643 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:32,644 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:61, output treesize:62 [2018-12-24 14:00:32,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:00:32,672 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:32,759 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:32,760 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:92 [2018-12-24 14:00:32,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,793 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 59 [2018-12-24 14:00:32,793 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,816 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:32,816 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2018-12-24 14:00:32,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 79 [2018-12-24 14:00:32,842 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,867 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:32,867 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2018-12-24 14:00:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:32,885 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:32,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:32,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2018-12-24 14:00:32,927 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:32,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:00:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:00:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:32,928 INFO L87 Difference]: Start difference. First operand 130 states and 682 transitions. Second operand 9 states. [2018-12-24 14:00:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:33,678 INFO L93 Difference]: Finished difference Result 219 states and 1011 transitions. [2018-12-24 14:00:33,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:00:33,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-24 14:00:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:33,681 INFO L225 Difference]: With dead ends: 219 [2018-12-24 14:00:33,681 INFO L226 Difference]: Without dead ends: 216 [2018-12-24 14:00:33,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-12-24 14:00:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2018-12-24 14:00:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-12-24 14:00:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 790 transitions. [2018-12-24 14:00:33,997 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 790 transitions. Word has length 6 [2018-12-24 14:00:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:33,998 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 790 transitions. [2018-12-24 14:00:33,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:00:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 790 transitions. [2018-12-24 14:00:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:33,998 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:33,998 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:33,999 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:33,999 INFO L82 PathProgramCache]: Analyzing trace with hash 896937626, now seen corresponding path program 3 times [2018-12-24 14:00:33,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:33,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:33,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:33,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:34,000 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:34,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:34,106 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:34,106 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:00:34,106 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:00:34,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:34,106 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:34,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:00:34,119 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:00:34,124 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:00:34,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:00:34,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:34,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 40 [2018-12-24 14:00:34,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,169 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 27 treesize of output 42 [2018-12-24 14:00:34,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 14:00:34,200 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,217 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,226 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:00:34,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 14:00:34,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-12-24 14:00:34,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:00:34,254 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 14:00:34,254 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,272 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,284 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,295 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,304 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,324 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:34,324 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:52, output treesize:50 [2018-12-24 14:00:34,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 60 [2018-12-24 14:00:34,360 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:34,455 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:34,455 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:75 [2018-12-24 14:00:34,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 80 [2018-12-24 14:00:34,507 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:34,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,614 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 48 treesize of output 74 [2018-12-24 14:00:34,615 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,674 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 3 xjuncts. [2018-12-24 14:00:34,674 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:90 [2018-12-24 14:00:34,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,735 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:34,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 88 [2018-12-24 14:00:34,750 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2018-12-24 14:00:34,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,922 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:34,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 65 [2018-12-24 14:00:34,924 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 79 [2018-12-24 14:00:35,022 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,110 INFO L267 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 3 dim-1 vars, End of recursive call: 16 dim-0 vars, and 5 xjuncts. [2018-12-24 14:00:35,110 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:117, output treesize:151 [2018-12-24 14:00:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:35,205 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:35,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:35,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:00:35,270 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:35,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:35,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:35,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:35,270 INFO L87 Difference]: Start difference. First operand 148 states and 790 transitions. Second operand 10 states. [2018-12-24 14:00:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:36,401 INFO L93 Difference]: Finished difference Result 218 states and 1012 transitions. [2018-12-24 14:00:36,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:00:36,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:00:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:36,404 INFO L225 Difference]: With dead ends: 218 [2018-12-24 14:00:36,404 INFO L226 Difference]: Without dead ends: 215 [2018-12-24 14:00:36,405 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:00:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-12-24 14:00:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 165. [2018-12-24 14:00:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-12-24 14:00:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 892 transitions. [2018-12-24 14:00:36,773 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 892 transitions. Word has length 6 [2018-12-24 14:00:36,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:36,773 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 892 transitions. [2018-12-24 14:00:36,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 892 transitions. [2018-12-24 14:00:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:36,774 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:36,774 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:36,774 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:36,775 INFO L82 PathProgramCache]: Analyzing trace with hash 900993110, now seen corresponding path program 1 times [2018-12-24 14:00:36,775 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:36,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:36,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:00:36,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:36,776 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:36,937 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-12-24 14:00:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:36,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:36,949 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:36,949 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:36,949 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [26], [27] [2018-12-24 14:00:36,950 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:36,950 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:36,952 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:36,952 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:36,952 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:36,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:36,953 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:36,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:36,962 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:36,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:36,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:36,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:37,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:37,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:37,066 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,080 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,095 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,110 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,131 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 18 treesize of output 21 [2018-12-24 14:00:37,135 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 21 treesize of output 23 [2018-12-24 14:00:37,139 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 23 treesize of output 33 [2018-12-24 14:00:37,142 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 25 treesize of output 47 [2018-12-24 14:00:37,146 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 27 treesize of output 62 [2018-12-24 14:00:37,146 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,494 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,504 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,514 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,523 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,550 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:37,550 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:61, output treesize:62 [2018-12-24 14:00:37,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:00:37,575 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,603 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:37,603 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:00:37,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2018-12-24 14:00:37,627 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,656 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:37,656 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:34 [2018-12-24 14:00:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:37,673 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:37,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:37,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:37,701 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:37,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:37,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:37,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:37,702 INFO L87 Difference]: Start difference. First operand 165 states and 892 transitions. Second operand 8 states. [2018-12-24 14:00:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:38,534 INFO L93 Difference]: Finished difference Result 274 states and 1371 transitions. [2018-12-24 14:00:38,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:38,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:00:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:38,538 INFO L225 Difference]: With dead ends: 274 [2018-12-24 14:00:38,538 INFO L226 Difference]: Without dead ends: 269 [2018-12-24 14:00:38,538 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 [2018-12-24 14:00:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-12-24 14:00:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 221. [2018-12-24 14:00:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-12-24 14:00:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1227 transitions. [2018-12-24 14:00:39,106 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1227 transitions. Word has length 6 [2018-12-24 14:00:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:39,107 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1227 transitions. [2018-12-24 14:00:39,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:39,107 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1227 transitions. [2018-12-24 14:00:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:00:39,108 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:39,108 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:00:39,108 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash 900750874, now seen corresponding path program 1 times [2018-12-24 14:00:39,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:39,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:39,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:39,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:39,110 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:39,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:39,256 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:39,256 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:00:39,256 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [20], [24], [25] [2018-12-24 14:00:39,257 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:39,257 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:39,259 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:39,259 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:39,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:39,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:39,259 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:39,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:39,269 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:39,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:39,280 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 18 treesize of output 21 [2018-12-24 14:00:39,285 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 21 treesize of output 23 [2018-12-24 14:00:39,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:00:39,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:00:39,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:00:39,342 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,367 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,379 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,388 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,397 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:39,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:39,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:39,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:39,511 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,524 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,537 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,552 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,578 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:39,579 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:00:39,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:00:39,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,629 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:39,629 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:00:39,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:00:39,662 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:39,754 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:39,754 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:72 [2018-12-24 14:00:39,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,804 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:39,804 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 83 [2018-12-24 14:00:39,805 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,827 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:39,827 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:27 [2018-12-24 14:00:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:39,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:39,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:39,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-24 14:00:39,878 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:39,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:39,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:39,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:39,879 INFO L87 Difference]: Start difference. First operand 221 states and 1227 transitions. Second operand 10 states. [2018-12-24 14:00:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:41,531 INFO L93 Difference]: Finished difference Result 480 states and 2479 transitions. [2018-12-24 14:00:41,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-24 14:00:41,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:00:41,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:41,535 INFO L225 Difference]: With dead ends: 480 [2018-12-24 14:00:41,535 INFO L226 Difference]: Without dead ends: 477 [2018-12-24 14:00:41,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2018-12-24 14:00:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 348. [2018-12-24 14:00:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-12-24 14:00:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1989 transitions. [2018-12-24 14:00:42,459 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1989 transitions. Word has length 6 [2018-12-24 14:00:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:42,459 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 1989 transitions. [2018-12-24 14:00:42,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:00:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1989 transitions. [2018-12-24 14:00:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:00:42,460 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:42,460 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-12-24 14:00:42,460 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2019467998, now seen corresponding path program 1 times [2018-12-24 14:00:42,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:42,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:42,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:42,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:42,462 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:42,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:42,504 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:42,504 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:00:42,504 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [26], [28], [29] [2018-12-24 14:00:42,505 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:42,505 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:42,507 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:42,507 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 60 root evaluator evaluations with a maximum evaluation depth of 2. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:42,508 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:42,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:42,508 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:42,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:42,517 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:42,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:42,525 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 18 treesize of output 21 [2018-12-24 14:00:42,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:00:42,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2018-12-24 14:00:42,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2018-12-24 14:00:42,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2018-12-24 14:00:42,571 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,579 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,588 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,597 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,606 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,615 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:42,615 INFO L202 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:18, output treesize:26 [2018-12-24 14:00:42,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2018-12-24 14:00:42,622 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,623 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,623 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2018-12-24 14:00:42,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 5 [2018-12-24 14:00:42,629 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,631 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,631 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2018-12-24 14:00:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:42,636 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:42,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:00:42,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2018-12-24 14:00:42,659 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-24 14:00:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-24 14:00:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:42,660 INFO L87 Difference]: Start difference. First operand 348 states and 1989 transitions. Second operand 5 states. [2018-12-24 14:00:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:44,715 INFO L93 Difference]: Finished difference Result 804 states and 4563 transitions. [2018-12-24 14:00:44,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:44,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-12-24 14:00:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:44,722 INFO L225 Difference]: With dead ends: 804 [2018-12-24 14:00:44,722 INFO L226 Difference]: Without dead ends: 800 [2018-12-24 14:00:44,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2018-12-24 14:00:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 774. [2018-12-24 14:00:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 774 states. [2018-12-24 14:00:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 4522 transitions. [2018-12-24 14:00:46,881 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 4522 transitions. Word has length 7 [2018-12-24 14:00:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:46,881 INFO L480 AbstractCegarLoop]: Abstraction has 774 states and 4522 transitions. [2018-12-24 14:00:46,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-24 14:00:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 4522 transitions. [2018-12-24 14:00:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:00:46,884 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:46,884 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:00:46,884 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2018168854, now seen corresponding path program 1 times [2018-12-24 14:00:46,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:46,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:46,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:46,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:46,886 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:47,060 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-12-24 14:00:47,218 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:00:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:47,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:47,271 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:47,271 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:00:47,271 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [20], [24], [25] [2018-12-24 14:00:47,272 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:47,272 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:47,274 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:47,274 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:00:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:47,275 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:47,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:47,275 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:47,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:47,286 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:47,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:47,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:00:47,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 14:00:47,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-12-24 14:00:47,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,323 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 25 treesize of output 51 [2018-12-24 14:00:47,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,331 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,332 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:00:47,333 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,402 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,416 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,426 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,435 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:00:47,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:00:47,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:00:47,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,576 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:47,577 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,592 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,607 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,622 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,650 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,651 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:69, output treesize:66 [2018-12-24 14:00:47,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:00:47,685 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,711 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:47,711 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2018-12-24 14:00:47,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 14:00:47,747 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,775 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:47,776 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2018-12-24 14:00:47,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,810 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:47,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 94 [2018-12-24 14:00:47,811 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,844 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:47,845 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2018-12-24 14:00:47,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:47,903 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:47,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:00:47,905 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:47,939 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:47,939 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2018-12-24 14:00:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:48,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:48,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:48,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:00:48,266 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:48,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:00:48,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:00:48,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:00:48,267 INFO L87 Difference]: Start difference. First operand 774 states and 4522 transitions. Second operand 12 states. [2018-12-24 14:00:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:51,011 INFO L93 Difference]: Finished difference Result 821 states and 4651 transitions. [2018-12-24 14:00:51,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:51,011 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:00:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:51,018 INFO L225 Difference]: With dead ends: 821 [2018-12-24 14:00:51,018 INFO L226 Difference]: Without dead ends: 820 [2018-12-24 14:00:51,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:00:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2018-12-24 14:00:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 736. [2018-12-24 14:00:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-12-24 14:00:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 4294 transitions. [2018-12-24 14:00:53,104 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 4294 transitions. Word has length 7 [2018-12-24 14:00:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:53,105 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 4294 transitions. [2018-12-24 14:00:53,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:00:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 4294 transitions. [2018-12-24 14:00:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:00:53,107 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:53,107 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:00:53,107 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:53,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2017620956, now seen corresponding path program 1 times [2018-12-24 14:00:53,108 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:53,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:53,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:53,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:53,109 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:53,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:53,146 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:53,147 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:00:53,147 INFO L207 CegarAbsIntRunner]: [0], [18], [20], [24], [26], [28], [29] [2018-12-24 14:00:53,147 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:53,148 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:53,149 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:53,149 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:53,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:53,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:53,150 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:53,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:53,159 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:53,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:53,170 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 17 treesize of output 20 [2018-12-24 14:00:53,173 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 20 treesize of output 22 [2018-12-24 14:00:53,181 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 22 treesize of output 24 [2018-12-24 14:00:53,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:53,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:53,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:53,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:53,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2018-12-24 14:00:53,206 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,214 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,222 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,232 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,245 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 18 treesize of output 21 [2018-12-24 14:00:53,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2018-12-24 14:00:53,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2018-12-24 14:00:53,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2018-12-24 14:00:53,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 42 [2018-12-24 14:00:53,272 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,286 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,295 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,304 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,313 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,329 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:53,329 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:36, output treesize:42 [2018-12-24 14:00:53,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:53,349 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2018-12-24 14:00:53,350 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,355 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,355 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2018-12-24 14:00:53,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:53,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:53,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:53,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:53,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 29 [2018-12-24 14:00:53,370 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:53,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:53,377 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:13 [2018-12-24 14:00:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:53,387 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:53,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:53,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:53,430 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:53,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:53,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:53,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:53,431 INFO L87 Difference]: Start difference. First operand 736 states and 4294 transitions. Second operand 8 states. [2018-12-24 14:00:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:55,614 INFO L93 Difference]: Finished difference Result 805 states and 4572 transitions. [2018-12-24 14:00:55,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:55,615 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:00:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:55,621 INFO L225 Difference]: With dead ends: 805 [2018-12-24 14:00:55,621 INFO L226 Difference]: Without dead ends: 804 [2018-12-24 14:00:55,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:55,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2018-12-24 14:00:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 776. [2018-12-24 14:00:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2018-12-24 14:00:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 4534 transitions. [2018-12-24 14:00:57,761 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 4534 transitions. Word has length 7 [2018-12-24 14:00:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:57,761 INFO L480 AbstractCegarLoop]: Abstraction has 776 states and 4534 transitions. [2018-12-24 14:00:57,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 4534 transitions. [2018-12-24 14:00:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:00:57,763 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:57,763 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:00:57,763 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:57,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:57,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2018040016, now seen corresponding path program 1 times [2018-12-24 14:00:57,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:57,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:57,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:57,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:57,765 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:57,957 WARN L181 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2018-12-24 14:00:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:58,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:58,007 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:58,008 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:00:58,008 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [20], [24], [26], [27] [2018-12-24 14:00:58,008 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:58,009 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:58,011 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:58,011 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:00:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:58,011 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:58,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:58,012 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:58,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:58,019 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:58,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:58,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:00:58,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:00:58,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,039 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 23 treesize of output 33 [2018-12-24 14:00:58,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,056 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 25 treesize of output 47 [2018-12-24 14:00:58,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:00:58,067 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,090 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,103 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,111 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,120 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:00:58,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:00:58,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:00:58,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:00:58,239 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,253 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,265 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,280 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,306 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:58,306 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:00:58,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:00:58,351 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,367 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:58,368 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:00:58,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,393 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 59 [2018-12-24 14:00:58,394 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,413 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:58,413 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:27 [2018-12-24 14:00:58,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,438 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:58,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,440 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 72 [2018-12-24 14:00:58,440 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,463 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:58,463 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:25 [2018-12-24 14:00:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:58,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:58,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:58,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:00:58,549 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:58,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:00:58,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:00:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:58,550 INFO L87 Difference]: Start difference. First operand 776 states and 4534 transitions. Second operand 10 states. [2018-12-24 14:01:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:01,521 INFO L93 Difference]: Finished difference Result 1004 states and 5711 transitions. [2018-12-24 14:01:01,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:01:01,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:01:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:01,531 INFO L225 Difference]: With dead ends: 1004 [2018-12-24 14:01:01,531 INFO L226 Difference]: Without dead ends: 1003 [2018-12-24 14:01:01,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2018-12-24 14:01:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 847. [2018-12-24 14:01:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2018-12-24 14:01:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 4961 transitions. [2018-12-24 14:01:03,982 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 4961 transitions. Word has length 7 [2018-12-24 14:01:03,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:03,982 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 4961 transitions. [2018-12-24 14:01:03,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 4961 transitions. [2018-12-24 14:01:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:01:03,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:03,984 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:01:03,984 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2030550250, now seen corresponding path program 1 times [2018-12-24 14:01:03,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:03,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:03,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:03,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:03,986 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:04,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:04,082 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:04,082 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:01:04,082 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [26], [28], [29] [2018-12-24 14:01:04,083 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:04,083 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:04,086 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:04,086 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:04,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:04,086 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:04,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:04,086 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:04,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:04,099 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:04,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:04,110 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 26 treesize of output 25 [2018-12-24 14:01:04,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,125 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 22 treesize of output 38 [2018-12-24 14:01:04,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2018-12-24 14:01:04,164 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,172 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,181 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,194 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 18 treesize of output 21 [2018-12-24 14:01:04,198 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 21 treesize of output 23 [2018-12-24 14:01:04,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:01:04,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:01:04,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 46 [2018-12-24 14:01:04,210 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,226 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,237 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,246 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,256 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,274 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,274 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:44, output treesize:46 [2018-12-24 14:01:04,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2018-12-24 14:01:04,304 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,319 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,320 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:29 [2018-12-24 14:01:04,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 59 [2018-12-24 14:01:04,353 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:04,406 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:04,407 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:46 [2018-12-24 14:01:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:04,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:04,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:04,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2018-12-24 14:01:04,474 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:04,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:01:04,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:01:04,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:04,475 INFO L87 Difference]: Start difference. First operand 847 states and 4961 transitions. Second operand 9 states. [2018-12-24 14:01:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:07,967 INFO L93 Difference]: Finished difference Result 1213 states and 6892 transitions. [2018-12-24 14:01:07,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:01:07,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2018-12-24 14:01:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:07,977 INFO L225 Difference]: With dead ends: 1213 [2018-12-24 14:01:07,977 INFO L226 Difference]: Without dead ends: 1212 [2018-12-24 14:01:07,977 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2018-12-24 14:01:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1101. [2018-12-24 14:01:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2018-12-24 14:01:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 6484 transitions. [2018-12-24 14:01:11,030 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 6484 transitions. Word has length 7 [2018-12-24 14:01:11,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:11,030 INFO L480 AbstractCegarLoop]: Abstraction has 1101 states and 6484 transitions. [2018-12-24 14:01:11,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:01:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 6484 transitions. [2018-12-24 14:01:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:01:11,033 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:11,033 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:01:11,033 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2026994678, now seen corresponding path program 1 times [2018-12-24 14:01:11,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:11,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:11,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:11,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:11,034 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:11,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:11,156 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:11,156 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:01:11,156 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [20], [24], [25] [2018-12-24 14:01:11,157 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:11,157 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:11,159 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:11,159 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:01:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:11,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:11,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:11,160 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:11,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:11,177 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:11,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:11,209 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 18 treesize of output 21 [2018-12-24 14:01:11,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2018-12-24 14:01:11,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,217 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 23 treesize of output 37 [2018-12-24 14:01:11,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,224 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:01:11,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,230 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:01:11,231 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,256 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,269 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,281 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,292 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:11,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:11,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:11,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:11,440 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,458 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,474 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,492 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:11,524 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:69, output treesize:66 [2018-12-24 14:01:11,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:01:11,559 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,588 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:11,589 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:01:11,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,658 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:11,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 14:01:11,659 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,692 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:11,693 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:42 [2018-12-24 14:01:11,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 82 [2018-12-24 14:01:11,732 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,763 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:11,764 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:38 [2018-12-24 14:01:11,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,818 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:11,818 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 96 [2018-12-24 14:01:11,819 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,858 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:11,858 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2018-12-24 14:01:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:11,879 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:11,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:11,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:01:11,943 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:11,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:01:11,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:01:11,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:11,943 INFO L87 Difference]: Start difference. First operand 1101 states and 6484 transitions. Second operand 12 states. [2018-12-24 14:01:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:16,648 INFO L93 Difference]: Finished difference Result 1577 states and 9103 transitions. [2018-12-24 14:01:16,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:01:16,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:01:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:16,662 INFO L225 Difference]: With dead ends: 1577 [2018-12-24 14:01:16,662 INFO L226 Difference]: Without dead ends: 1575 [2018-12-24 14:01:16,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:01:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2018-12-24 14:01:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 754. [2018-12-24 14:01:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2018-12-24 14:01:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 4401 transitions. [2018-12-24 14:01:18,809 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 4401 transitions. Word has length 7 [2018-12-24 14:01:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:18,809 INFO L480 AbstractCegarLoop]: Abstraction has 754 states and 4401 transitions. [2018-12-24 14:01:18,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:01:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 4401 transitions. [2018-12-24 14:01:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:01:18,811 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:18,811 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:01:18,812 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2027404064, now seen corresponding path program 1 times [2018-12-24 14:01:18,812 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:18,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:18,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:18,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:18,813 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:18,958 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:01:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:18,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:18,990 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:18,990 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:01:18,990 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [18], [24], [25] [2018-12-24 14:01:18,990 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:18,990 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:18,992 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:18,992 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:01:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:18,993 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:18,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:18,993 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:19,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:19,003 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:19,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:19,025 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 18 treesize of output 21 [2018-12-24 14:01:19,027 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 21 treesize of output 27 [2018-12-24 14:01:19,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,033 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 23 treesize of output 37 [2018-12-24 14:01:19,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,039 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 25 treesize of output 51 [2018-12-24 14:01:19,046 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 14:01:19,047 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,062 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,076 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,088 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,097 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,118 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 31 treesize of output 40 [2018-12-24 14:01:19,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,144 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 27 treesize of output 42 [2018-12-24 14:01:19,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 14:01:19,175 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,183 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,192 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,215 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,215 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:52, output treesize:50 [2018-12-24 14:01:19,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:01:19,259 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,275 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,276 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:01:19,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,300 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:19,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 60 [2018-12-24 14:01:19,301 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,320 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:29 [2018-12-24 14:01:19,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 61 [2018-12-24 14:01:19,348 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,367 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,367 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:29 [2018-12-24 14:01:19,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,394 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:19,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 75 [2018-12-24 14:01:19,395 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,417 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,417 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:33 [2018-12-24 14:01:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:19,436 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:19,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:19,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2018-12-24 14:01:19,502 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:19,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:01:19,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:01:19,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:01:19,502 INFO L87 Difference]: Start difference. First operand 754 states and 4401 transitions. Second operand 11 states. [2018-12-24 14:01:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:23,002 INFO L93 Difference]: Finished difference Result 1108 states and 6316 transitions. [2018-12-24 14:01:23,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:01:23,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:01:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:23,009 INFO L225 Difference]: With dead ends: 1108 [2018-12-24 14:01:23,009 INFO L226 Difference]: Without dead ends: 1107 [2018-12-24 14:01:23,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:01:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2018-12-24 14:01:25,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1052. [2018-12-24 14:01:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-12-24 14:01:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 6189 transitions. [2018-12-24 14:01:25,991 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 6189 transitions. Word has length 7 [2018-12-24 14:01:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:25,992 INFO L480 AbstractCegarLoop]: Abstraction has 1052 states and 6189 transitions. [2018-12-24 14:01:25,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:01:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 6189 transitions. [2018-12-24 14:01:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:01:25,994 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:25,994 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:01:25,994 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:25,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1973291948, now seen corresponding path program 1 times [2018-12-24 14:01:25,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:25,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:25,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:25,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:25,996 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:26,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:26,112 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:26,112 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:01:26,113 INFO L207 CegarAbsIntRunner]: [0], [6], [20], [24], [26], [28], [29] [2018-12-24 14:01:26,114 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:26,114 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:26,116 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:26,116 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:26,117 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:26,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:26,117 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:26,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:26,149 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:26,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:26,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:01:26,160 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 21 treesize of output 23 [2018-12-24 14:01:26,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,168 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 23 treesize of output 33 [2018-12-24 14:01:26,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:01:26,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,192 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 27 treesize of output 62 [2018-12-24 14:01:26,192 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,221 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,233 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,241 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,251 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:01:26,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,287 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 [2018-12-24 14:01:26,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:01:26,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:01:26,361 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,375 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,388 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,403 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,430 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:26,430 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:01:26,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:01:26,458 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,483 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:26,483 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:01:26,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,510 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:26,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 80 [2018-12-24 14:01:26,519 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:26,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:26,607 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:72 [2018-12-24 14:01:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:26,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:26,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:26,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:26,678 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:26,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:26,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:26,678 INFO L87 Difference]: Start difference. First operand 1052 states and 6189 transitions. Second operand 8 states. [2018-12-24 14:01:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:29,956 INFO L93 Difference]: Finished difference Result 1075 states and 6230 transitions. [2018-12-24 14:01:29,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:29,956 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:01:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:29,961 INFO L225 Difference]: With dead ends: 1075 [2018-12-24 14:01:29,961 INFO L226 Difference]: Without dead ends: 1074 [2018-12-24 14:01:29,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2018-12-24 14:01:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1054. [2018-12-24 14:01:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1054 states. [2018-12-24 14:01:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 6201 transitions. [2018-12-24 14:01:32,960 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 6201 transitions. Word has length 7 [2018-12-24 14:01:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:32,960 INFO L480 AbstractCegarLoop]: Abstraction has 1054 states and 6201 transitions. [2018-12-24 14:01:32,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 6201 transitions. [2018-12-24 14:01:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:01:32,962 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:32,962 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:01:32,962 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1973720682, now seen corresponding path program 1 times [2018-12-24 14:01:32,962 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:32,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:32,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:32,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:32,963 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:33,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:33,055 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:33,055 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:01:33,055 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [20], [24], [25] [2018-12-24 14:01:33,056 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:33,056 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:33,058 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:33,058 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:01:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:33,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:33,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:33,059 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:33,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:33,068 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:33,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:33,090 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 18 treesize of output 21 [2018-12-24 14:01:33,093 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 21 treesize of output 27 [2018-12-24 14:01:33,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-12-24 14:01:33,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:01:33,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,113 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:01:33,113 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,140 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,155 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,166 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,177 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:01:33,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:01:33,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:01:33,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:33,316 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,331 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,346 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,361 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,389 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:33,390 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:69, output treesize:66 [2018-12-24 14:01:33,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:01:33,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:33,446 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:01:33,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,673 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:33,673 INFO L303 Elim1Store]: Index analysis took 205 ms [2018-12-24 14:01:33,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:01:33,674 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,906 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:33,906 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2018-12-24 14:01:33,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:01:33,937 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:33,968 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:33,969 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2018-12-24 14:01:33,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,003 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:34,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:01:34,004 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,035 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:34,036 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2018-12-24 14:01:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:36,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:36,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:36,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:01:36,135 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:36,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:01:36,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:01:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=149, Unknown=1, NotChecked=0, Total=240 [2018-12-24 14:01:36,136 INFO L87 Difference]: Start difference. First operand 1054 states and 6201 transitions. Second operand 12 states. [2018-12-24 14:01:41,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:41,135 INFO L93 Difference]: Finished difference Result 1522 states and 8743 transitions. [2018-12-24 14:01:41,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:01:41,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:01:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:41,143 INFO L225 Difference]: With dead ends: 1522 [2018-12-24 14:01:41,143 INFO L226 Difference]: Without dead ends: 1521 [2018-12-24 14:01:41,143 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=134, Invalid=245, Unknown=1, NotChecked=0, Total=380 [2018-12-24 14:01:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2018-12-24 14:01:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1125. [2018-12-24 14:01:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1125 states. [2018-12-24 14:01:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 6627 transitions. [2018-12-24 14:01:44,444 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 6627 transitions. Word has length 7 [2018-12-24 14:01:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:44,444 INFO L480 AbstractCegarLoop]: Abstraction has 1125 states and 6627 transitions. [2018-12-24 14:01:44,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:01:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 6627 transitions. [2018-12-24 14:01:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:01:44,447 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:44,447 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:01:44,447 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1956607002, now seen corresponding path program 1 times [2018-12-24 14:01:44,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:44,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:44,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:44,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:44,448 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:44,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:44,469 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:44,470 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:01:44,470 INFO L207 CegarAbsIntRunner]: [0], [20], [24], [26], [28], [30], [31] [2018-12-24 14:01:44,471 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:44,471 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:44,473 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:44,473 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:01:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:44,473 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:44,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:44,474 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:44,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:44,483 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:44,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:44,491 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 18 treesize of output 21 [2018-12-24 14:01:44,498 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 21 treesize of output 23 [2018-12-24 14:01:44,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2018-12-24 14:01:44,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2018-12-24 14:01:44,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2018-12-24 14:01:44,539 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,546 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,555 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,564 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,572 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,582 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:44,582 INFO L202 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:18, output treesize:26 [2018-12-24 14:01:44,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:44,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2018-12-24 14:01:44,588 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,589 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:44,589 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2018-12-24 14:01:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:44,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:44,629 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:01:44,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:01:44,629 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:01:44,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:01:44,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:01:44,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:01:44,630 INFO L87 Difference]: Start difference. First operand 1125 states and 6627 transitions. Second operand 4 states. [2018-12-24 14:01:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:48,867 INFO L93 Difference]: Finished difference Result 1559 states and 9048 transitions. [2018-12-24 14:01:48,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:01:48,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-12-24 14:01:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:48,874 INFO L225 Difference]: With dead ends: 1559 [2018-12-24 14:01:48,874 INFO L226 Difference]: Without dead ends: 1554 [2018-12-24 14:01:48,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:01:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-12-24 14:01:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1528. [2018-12-24 14:01:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1528 states. [2018-12-24 14:01:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 8994 transitions. [2018-12-24 14:01:53,420 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 8994 transitions. Word has length 7 [2018-12-24 14:01:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:53,421 INFO L480 AbstractCegarLoop]: Abstraction has 1528 states and 8994 transitions. [2018-12-24 14:01:53,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:01:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 8994 transitions. [2018-12-24 14:01:53,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:01:53,423 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:53,423 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:01:53,423 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:53,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1969597864, now seen corresponding path program 1 times [2018-12-24 14:01:53,424 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:53,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:53,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:53,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:53,424 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:53,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:53,480 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:53,480 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:01:53,480 INFO L207 CegarAbsIntRunner]: [0], [10], [20], [24], [26], [28], [29] [2018-12-24 14:01:53,481 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:53,482 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:53,484 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:53,484 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:53,484 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:53,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:53,484 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:53,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:53,511 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:53,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:53,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:01:53,584 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 21 treesize of output 23 [2018-12-24 14:01:53,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,588 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 23 treesize of output 33 [2018-12-24 14:01:53,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,596 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 25 treesize of output 47 [2018-12-24 14:01:53,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,605 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 27 treesize of output 62 [2018-12-24 14:01:53,605 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,631 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,644 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,655 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,665 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:01:53,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,737 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:01:53,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:01:53,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:01:53,820 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,834 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,847 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,862 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,888 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:53,889 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:01:53,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,911 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:01:53,912 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,936 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:53,936 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:01:53,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:01:53,975 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:54,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:54,069 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:72 [2018-12-24 14:01:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:54,108 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:54,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:54,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:01:54,141 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:54,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:54,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:54,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:54,142 INFO L87 Difference]: Start difference. First operand 1528 states and 8994 transitions. Second operand 8 states. [2018-12-24 14:01:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:58,787 INFO L93 Difference]: Finished difference Result 1574 states and 9156 transitions. [2018-12-24 14:01:58,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:58,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:01:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:58,792 INFO L225 Difference]: With dead ends: 1574 [2018-12-24 14:01:58,792 INFO L226 Difference]: Without dead ends: 1570 [2018-12-24 14:01:58,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2018-12-24 14:02:03,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1547. [2018-12-24 14:02:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1547 states. [2018-12-24 14:02:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 9102 transitions. [2018-12-24 14:02:03,277 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 9102 transitions. Word has length 7 [2018-12-24 14:02:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:03,277 INFO L480 AbstractCegarLoop]: Abstraction has 1547 states and 9102 transitions. [2018-12-24 14:02:03,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:02:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 9102 transitions. [2018-12-24 14:02:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:02:03,279 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:03,279 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-12-24 14:02:03,279 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1969901668, now seen corresponding path program 2 times [2018-12-24 14:02:03,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:03,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:03,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:03,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:03,281 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:02:03,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:03,364 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:03,364 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:02:03,365 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:02:03,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:03,365 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:03,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:02:03,376 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:02:03,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:02:03,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:02:03,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:03,387 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 18 treesize of output 21 [2018-12-24 14:02:03,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:02:03,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,396 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 23 treesize of output 33 [2018-12-24 14:02:03,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,404 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 25 treesize of output 47 [2018-12-24 14:02:03,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,412 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 27 treesize of output 62 [2018-12-24 14:02:03,413 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,437 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,451 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,461 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,470 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:02:03,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:02:03,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:02:03,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:02:03,579 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,593 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,607 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,622 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,647 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:03,648 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:02:03,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:02:03,672 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,697 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:03,697 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2018-12-24 14:02:03,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:02:03,735 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:03,827 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2018-12-24 14:02:03,828 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:72 [2018-12-24 14:02:03,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,874 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:03,874 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 33 treesize of output 77 [2018-12-24 14:02:03,875 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,901 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:03,901 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:27 [2018-12-24 14:02:03,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 79 [2018-12-24 14:02:03,931 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,956 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:03,956 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:23 [2018-12-24 14:02:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:03,977 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:04,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:04,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:02:04,045 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:04,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:02:04,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:02:04,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:02:04,046 INFO L87 Difference]: Start difference. First operand 1547 states and 9102 transitions. Second operand 11 states. [2018-12-24 14:02:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:10,498 INFO L93 Difference]: Finished difference Result 2098 states and 12192 transitions. [2018-12-24 14:02:10,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:02:10,499 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:02:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:10,504 INFO L225 Difference]: With dead ends: 2098 [2018-12-24 14:02:10,504 INFO L226 Difference]: Without dead ends: 2091 [2018-12-24 14:02:10,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:02:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2018-12-24 14:02:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1838. [2018-12-24 14:02:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1838 states. [2018-12-24 14:02:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 10847 transitions. [2018-12-24 14:02:15,989 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 10847 transitions. Word has length 7 [2018-12-24 14:02:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:15,989 INFO L480 AbstractCegarLoop]: Abstraction has 1838 states and 10847 transitions. [2018-12-24 14:02:15,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:02:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 10847 transitions. [2018-12-24 14:02:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:02:15,992 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:15,992 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:02:15,992 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1965903780, now seen corresponding path program 1 times [2018-12-24 14:02:15,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:15,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:15,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:02:15,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:15,993 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:16,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:16,037 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:16,038 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:02:16,038 INFO L207 CegarAbsIntRunner]: [0], [14], [20], [24], [26], [28], [29] [2018-12-24 14:02:16,039 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:16,039 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:16,041 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:16,041 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:02:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:16,041 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:16,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:16,042 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:16,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:16,054 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:16,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:16,061 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 18 treesize of output 21 [2018-12-24 14:02:16,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:02:16,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,071 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 23 treesize of output 33 [2018-12-24 14:02:16,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:02:16,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,087 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 27 treesize of output 62 [2018-12-24 14:02:16,088 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,113 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,124 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,133 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,144 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,163 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 43 treesize of output 39 [2018-12-24 14:02:16,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:02:16,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:02:16,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:02:16,262 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,276 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,290 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,305 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,331 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:16,331 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:02:16,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,365 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 51 [2018-12-24 14:02:16,365 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,382 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:16,383 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2018-12-24 14:02:16,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,431 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:16,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2018-12-24 14:02:16,432 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:16,450 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:16,450 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:29 [2018-12-24 14:02:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:16,465 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:16,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:16,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:02:16,503 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:16,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:02:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:02:16,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:02:16,504 INFO L87 Difference]: Start difference. First operand 1838 states and 10847 transitions. Second operand 8 states. [2018-12-24 14:02:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:21,845 INFO L93 Difference]: Finished difference Result 1846 states and 10859 transitions. [2018-12-24 14:02:21,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:02:21,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:02:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:21,850 INFO L225 Difference]: With dead ends: 1846 [2018-12-24 14:02:21,850 INFO L226 Difference]: Without dead ends: 1839 [2018-12-24 14:02:21,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:02:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2018-12-24 14:02:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1838. [2018-12-24 14:02:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1838 states. [2018-12-24 14:02:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 10841 transitions. [2018-12-24 14:02:27,329 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 10841 transitions. Word has length 7 [2018-12-24 14:02:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:27,329 INFO L480 AbstractCegarLoop]: Abstraction has 1838 states and 10841 transitions. [2018-12-24 14:02:27,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:02:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 10841 transitions. [2018-12-24 14:02:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:02:27,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:27,331 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:02:27,332 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:27,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1931530426, now seen corresponding path program 1 times [2018-12-24 14:02:27,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:27,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:27,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:27,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:27,332 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:02:27,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:27,447 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:27,447 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:02:27,447 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [24], [26], [27] [2018-12-24 14:02:27,449 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:27,449 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:27,450 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:27,450 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:02:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:27,450 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:27,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:27,451 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:27,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:27,461 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:27,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:27,470 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 18 treesize of output 21 [2018-12-24 14:02:27,474 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 21 treesize of output 23 [2018-12-24 14:02:27,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:02:27,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,487 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 25 treesize of output 47 [2018-12-24 14:02:27,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,497 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 27 treesize of output 62 [2018-12-24 14:02:27,497 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:27,523 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:27,536 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:27,545 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:27,555 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:27,575 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 [2018-12-24 14:02:27,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,594 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 [2018-12-24 14:02:27,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:02:27,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:02:27,672 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:27,686 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:27,700 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:27,715 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:27,739 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:27,739 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:02:27,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:02:27,778 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:27,869 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2018-12-24 14:02:27,869 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:96 [2018-12-24 14:02:27,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:27,958 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 47 treesize of output 61 [2018-12-24 14:02:27,958 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:28,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,024 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 78 [2018-12-24 14:02:28,024 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:28,068 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 2 xjuncts. [2018-12-24 14:02:28,069 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:108, output treesize:64 [2018-12-24 14:02:28,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,120 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:28,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 67 [2018-12-24 14:02:28,121 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:28,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,182 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:28,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:28,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 101 [2018-12-24 14:02:28,184 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:28,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:02:28,237 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:88, output treesize:70 [2018-12-24 14:02:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:28,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:28,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:28,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2018-12-24 14:02:28,405 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:28,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:02:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:02:28,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:02:28,406 INFO L87 Difference]: Start difference. First operand 1838 states and 10841 transitions. Second operand 11 states. [2018-12-24 14:02:30,330 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2018-12-24 14:02:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:35,893 INFO L93 Difference]: Finished difference Result 2193 states and 12710 transitions. [2018-12-24 14:02:35,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:02:35,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:02:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:35,899 INFO L225 Difference]: With dead ends: 2193 [2018-12-24 14:02:35,899 INFO L226 Difference]: Without dead ends: 2192 [2018-12-24 14:02:35,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:02:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2018-12-24 14:02:41,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1949. [2018-12-24 14:02:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1949 states. [2018-12-24 14:02:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 11505 transitions. [2018-12-24 14:02:41,872 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 11505 transitions. Word has length 7 [2018-12-24 14:02:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:41,872 INFO L480 AbstractCegarLoop]: Abstraction has 1949 states and 11505 transitions. [2018-12-24 14:02:41,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:02:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 11505 transitions. [2018-12-24 14:02:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:02:41,875 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:41,875 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:02:41,875 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1924430494, now seen corresponding path program 2 times [2018-12-24 14:02:41,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:41,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:41,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:41,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:41,876 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:41,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:41,981 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:41,981 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:02:41,981 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:02:41,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:41,981 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:41,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:02:41,989 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:02:41,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:02:41,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:02:41,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:42,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:02:42,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,049 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 [2018-12-24 14:02:42,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:02:42,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:02:42,136 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,275 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,292 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,310 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:02:42,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2018-12-24 14:02:42,340 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 23 treesize of output 37 [2018-12-24 14:02:42,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:02:42,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:02:42,346 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,369 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,382 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,392 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,401 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,429 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:42,430 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:69, output treesize:66 [2018-12-24 14:02:42,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:02:42,461 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,489 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:42,489 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:02:42,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:02:42,522 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,555 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:42,555 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:38 [2018-12-24 14:02:42,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,588 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:42,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:02:42,589 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,620 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:42,620 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2018-12-24 14:02:42,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:42,678 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:42,679 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 38 treesize of output 98 [2018-12-24 14:02:42,679 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:42,712 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:42,712 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2018-12-24 14:02:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:44,740 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:44,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:44,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:02:44,806 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:44,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:02:44,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:02:44,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=146, Unknown=1, NotChecked=0, Total=240 [2018-12-24 14:02:44,807 INFO L87 Difference]: Start difference. First operand 1949 states and 11505 transitions. Second operand 12 states. [2018-12-24 14:02:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:53,076 INFO L93 Difference]: Finished difference Result 2526 states and 14755 transitions. [2018-12-24 14:02:53,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:02:53,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:02:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:53,083 INFO L225 Difference]: With dead ends: 2526 [2018-12-24 14:02:53,083 INFO L226 Difference]: Without dead ends: 2520 [2018-12-24 14:02:53,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=125, Invalid=216, Unknown=1, NotChecked=0, Total=342 [2018-12-24 14:02:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2018-12-24 14:02:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1960. [2018-12-24 14:02:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1960 states. [2018-12-24 14:02:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 11570 transitions. [2018-12-24 14:02:59,132 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 11570 transitions. Word has length 7 [2018-12-24 14:02:59,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:59,132 INFO L480 AbstractCegarLoop]: Abstraction has 1960 states and 11570 transitions. [2018-12-24 14:02:59,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:02:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 11570 transitions. [2018-12-24 14:02:59,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:02:59,135 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:59,135 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:02:59,135 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:59,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:59,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1928255402, now seen corresponding path program 1 times [2018-12-24 14:02:59,135 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:59,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:59,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:02:59,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:59,136 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:02:59,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:59,209 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:59,210 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:02:59,210 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [26], [28], [29] [2018-12-24 14:02:59,211 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:59,211 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:59,213 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:59,213 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:02:59,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:59,213 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:59,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:59,214 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:59,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:59,227 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:59,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:59,236 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 18 treesize of output 21 [2018-12-24 14:02:59,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:02:59,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:02:59,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,253 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 25 treesize of output 47 [2018-12-24 14:02:59,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,261 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 27 treesize of output 62 [2018-12-24 14:02:59,262 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,287 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,300 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,309 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,319 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:02:59,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,362 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 36 treesize of output 49 [2018-12-24 14:02:59,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:02:59,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:02:59,440 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,454 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,467 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,482 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,508 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:59,509 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:02:59,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:02:59,542 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:02:59,632 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:02:59,632 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:96 [2018-12-24 14:02:59,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:59,672 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:59,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2018-12-24 14:02:59,673 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:59,691 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:59,691 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:29 [2018-12-24 14:02:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:59,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:59,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:59,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2018-12-24 14:02:59,833 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:59,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:02:59,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:02:59,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:02:59,833 INFO L87 Difference]: Start difference. First operand 1960 states and 11570 transitions. Second operand 9 states. [2018-12-24 14:03:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:05,652 INFO L93 Difference]: Finished difference Result 1971 states and 11600 transitions. [2018-12-24 14:03:05,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:03:05,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2018-12-24 14:03:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:05,658 INFO L225 Difference]: With dead ends: 1971 [2018-12-24 14:03:05,658 INFO L226 Difference]: Without dead ends: 1964 [2018-12-24 14:03:05,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:03:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2018-12-24 14:03:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1964. [2018-12-24 14:03:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1964 states. [2018-12-24 14:03:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 11590 transitions. [2018-12-24 14:03:11,739 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 11590 transitions. Word has length 7 [2018-12-24 14:03:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:11,739 INFO L480 AbstractCegarLoop]: Abstraction has 1964 states and 11590 transitions. [2018-12-24 14:03:11,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:03:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 11590 transitions. [2018-12-24 14:03:11,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:03:11,743 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:11,743 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:03:11,743 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:11,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2048132400, now seen corresponding path program 2 times [2018-12-24 14:03:11,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:11,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:11,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:11,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:11,744 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:03:11,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:11,803 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:11,803 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:03:11,803 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:03:11,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:11,803 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:03:11,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:03:11,813 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:03:11,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:03:11,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:03:11,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:11,823 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 18 treesize of output 21 [2018-12-24 14:03:11,826 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 21 treesize of output 23 [2018-12-24 14:03:11,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,832 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 23 treesize of output 33 [2018-12-24 14:03:11,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:03:11,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,849 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 27 treesize of output 62 [2018-12-24 14:03:11,849 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:11,872 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:11,885 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:11,894 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:11,904 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:11,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:03:11,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:03:11,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:11,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:03:12,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:03:12,018 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:12,032 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:12,046 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:12,061 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:12,087 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. [2018-12-24 14:03:12,087 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:03:12,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 51 [2018-12-24 14:03:12,131 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:12,149 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:12,149 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:03:12,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,175 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2018-12-24 14:03:12,175 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:12,196 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:12,196 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:27 [2018-12-24 14:03:12,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:12,225 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:12,226 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 78 [2018-12-24 14:03:12,226 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:12,247 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:12,248 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2018-12-24 14:03:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:12,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:12,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:12,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2018-12-24 14:03:12,317 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:12,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:03:12,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:03:12,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:03:12,317 INFO L87 Difference]: Start difference. First operand 1964 states and 11590 transitions. Second operand 9 states. [2018-12-24 14:03:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:18,420 INFO L93 Difference]: Finished difference Result 2036 states and 11913 transitions. [2018-12-24 14:03:18,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:03:18,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2018-12-24 14:03:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:18,426 INFO L225 Difference]: With dead ends: 2036 [2018-12-24 14:03:18,426 INFO L226 Difference]: Without dead ends: 2033 [2018-12-24 14:03:18,427 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:03:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2018-12-24 14:03:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2012. [2018-12-24 14:03:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2012 states. [2018-12-24 14:03:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 11885 transitions. [2018-12-24 14:03:24,642 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 11885 transitions. Word has length 7 [2018-12-24 14:03:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:24,643 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 11885 transitions. [2018-12-24 14:03:24,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:03:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 11885 transitions. [2018-12-24 14:03:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:03:24,645 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:24,645 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:03:24,646 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2047765234, now seen corresponding path program 3 times [2018-12-24 14:03:24,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:24,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:24,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:03:24,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:24,647 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:03:24,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:24,706 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:24,706 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:03:24,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:03:24,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:24,707 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:03:24,715 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:03:24,715 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:03:24,720 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:03:24,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:03:24,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:24,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:24,741 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 31 treesize of output 40 [2018-12-24 14:03:24,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:24,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:24,767 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 27 treesize of output 42 [2018-12-24 14:03:24,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:24,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:24,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:24,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:24,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 21 treesize of output 25 [2018-12-24 14:03:24,800 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:24,811 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:24,823 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:24,866 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 18 treesize of output 21 [2018-12-24 14:03:24,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 27 [2018-12-24 14:03:24,870 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 23 treesize of output 37 [2018-12-24 14:03:24,872 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 25 treesize of output 51 [2018-12-24 14:03:24,876 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 50 [2018-12-24 14:03:24,877 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:24,893 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:24,905 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:24,915 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:24,924 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:24,944 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:24,944 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:52, output treesize:50 [2018-12-24 14:03:24,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:24,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 60 [2018-12-24 14:03:24,981 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:03:25,047 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-12-24 14:03:25,048 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:75 [2018-12-24 14:03:25,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 80 [2018-12-24 14:03:25,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-24 14:03:25,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,285 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:25,286 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 45 treesize of output 59 [2018-12-24 14:03:25,286 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:25,369 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 5 xjuncts. [2018-12-24 14:03:25,370 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:96, output treesize:167 [2018-12-24 14:03:25,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 57 [2018-12-24 14:03:25,486 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:25,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 83 [2018-12-24 14:03:25,567 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:25,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,658 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:25,658 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 83 [2018-12-24 14:03:25,659 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:25,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,738 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:25,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,739 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 71 [2018-12-24 14:03:25,740 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:25,803 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2018-12-24 14:03:25,804 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:167, output treesize:115 [2018-12-24 14:03:25,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,871 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:25,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 55 [2018-12-24 14:03:25,872 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:25,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,944 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:25,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 83 [2018-12-24 14:03:25,954 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:26,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,034 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:26,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,035 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 67 [2018-12-24 14:03:26,036 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:26,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:26,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 93 [2018-12-24 14:03:26,111 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:26,176 INFO L267 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 4 xjuncts. [2018-12-24 14:03:26,177 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:155, output treesize:111 [2018-12-24 14:03:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:26,265 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:26,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:26,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:03:26,405 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:26,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:03:26,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:03:26,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:03:26,405 INFO L87 Difference]: Start difference. First operand 2012 states and 11885 transitions. Second operand 11 states. [2018-12-24 14:03:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:36,254 INFO L93 Difference]: Finished difference Result 2952 states and 17243 transitions. [2018-12-24 14:03:36,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:03:36,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:03:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:36,262 INFO L225 Difference]: With dead ends: 2952 [2018-12-24 14:03:36,262 INFO L226 Difference]: Without dead ends: 2951 [2018-12-24 14:03:36,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2018-12-24 14:03:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2018-12-24 14:03:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 1726. [2018-12-24 14:03:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-12-24 14:03:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 10171 transitions. [2018-12-24 14:03:41,813 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 10171 transitions. Word has length 7 [2018-12-24 14:03:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:41,813 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 10171 transitions. [2018-12-24 14:03:41,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:03:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 10171 transitions. [2018-12-24 14:03:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:03:41,815 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:41,815 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:03:41,815 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:41,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2035383838, now seen corresponding path program 1 times [2018-12-24 14:03:41,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:41,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:41,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:03:41,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:41,816 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:42,115 WARN L181 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-12-24 14:03:42,407 WARN L181 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2018-12-24 14:03:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:03:42,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:42,453 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:42,453 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:03:42,453 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [26], [28], [29] [2018-12-24 14:03:42,454 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:03:42,454 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:03:42,456 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:03:42,456 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:03:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:42,456 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:03:42,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:42,456 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:03:42,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:42,468 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:03:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:42,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:42,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:03:42,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:03:42,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:03:42,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:03:42,574 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,590 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,604 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,620 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,639 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 18 treesize of output 21 [2018-12-24 14:03:42,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2018-12-24 14:03:42,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:03:42,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:03:42,652 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 27 treesize of output 62 [2018-12-24 14:03:42,652 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,673 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,684 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,692 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,701 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,727 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:42,727 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:03:42,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,762 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:03:42,763 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:03:42,850 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:03:42,851 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:94 [2018-12-24 14:03:42,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,917 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:42,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 59 [2018-12-24 14:03:42,918 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:42,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:42,978 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 62 treesize of output 88 [2018-12-24 14:03:42,979 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:43,034 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:03:43,034 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:112, output treesize:86 [2018-12-24 14:03:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:43,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:43,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:43,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 10 [2018-12-24 14:03:43,160 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:43,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:03:43,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:03:43,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:03:43,161 INFO L87 Difference]: Start difference. First operand 1726 states and 10171 transitions. Second operand 10 states. [2018-12-24 14:03:43,393 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2018-12-24 14:03:43,579 WARN L181 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2018-12-24 14:03:43,726 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2018-12-24 14:03:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:49,980 INFO L93 Difference]: Finished difference Result 1903 states and 11093 transitions. [2018-12-24 14:03:49,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:03:49,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:03:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:49,986 INFO L225 Difference]: With dead ends: 1903 [2018-12-24 14:03:49,986 INFO L226 Difference]: Without dead ends: 1896 [2018-12-24 14:03:49,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:03:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2018-12-24 14:03:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1875. [2018-12-24 14:03:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1875 states. [2018-12-24 14:03:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 11063 transitions. [2018-12-24 14:03:56,180 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 11063 transitions. Word has length 7 [2018-12-24 14:03:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:56,180 INFO L480 AbstractCegarLoop]: Abstraction has 1875 states and 11063 transitions. [2018-12-24 14:03:56,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:03:56,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 11063 transitions. [2018-12-24 14:03:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:03:56,182 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:56,182 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:03:56,183 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:56,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2145066854, now seen corresponding path program 2 times [2018-12-24 14:03:56,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:56,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:56,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:56,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:56,184 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:03:56,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:56,245 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:56,245 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:03:56,245 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:03:56,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:56,245 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:03:56,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:03:56,253 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:03:56,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-24 14:03:56,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:03:56,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:56,263 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 18 treesize of output 21 [2018-12-24 14:03:56,265 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 21 treesize of output 23 [2018-12-24 14:03:56,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,272 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 23 treesize of output 33 [2018-12-24 14:03:56,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,279 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 25 treesize of output 47 [2018-12-24 14:03:56,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,288 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 27 treesize of output 62 [2018-12-24 14:03:56,288 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,313 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,325 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,335 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,346 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:03:56,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:03:56,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:03:56,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:03:56,456 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,470 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,483 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,498 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,525 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:56,525 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:03:56,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:03:56,549 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:56,575 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:56,576 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:03:56,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:56,602 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:03:56,610 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 2 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:03:56,611 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:03:56,696 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:03:56,696 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:72 [2018-12-24 14:03:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:56,732 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:03:56,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:56,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:03:56,769 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:56,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:03:56,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:03:56,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:03:56,770 INFO L87 Difference]: Start difference. First operand 1875 states and 11063 transitions. Second operand 8 states. [2018-12-24 14:04:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:04:02,824 INFO L93 Difference]: Finished difference Result 1884 states and 11081 transitions. [2018-12-24 14:04:02,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:04:02,824 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:04:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:04:02,829 INFO L225 Difference]: With dead ends: 1884 [2018-12-24 14:04:02,829 INFO L226 Difference]: Without dead ends: 1877 [2018-12-24 14:04:02,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:04:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2018-12-24 14:04:09,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1877. [2018-12-24 14:04:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1877 states. [2018-12-24 14:04:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 11071 transitions. [2018-12-24 14:04:09,164 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 11071 transitions. Word has length 7 [2018-12-24 14:04:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:04:09,165 INFO L480 AbstractCegarLoop]: Abstraction has 1877 states and 11071 transitions. [2018-12-24 14:04:09,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:04:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 11071 transitions. [2018-12-24 14:04:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:04:09,167 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:04:09,168 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:04:09,168 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:04:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1861574920, now seen corresponding path program 1 times [2018-12-24 14:04:09,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:04:09,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:09,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:04:09,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:09,169 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:04:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:09,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:09,268 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:04:09,268 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-24 14:04:09,269 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [20], [24], [26], [28], [29] [2018-12-24 14:04:09,269 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:04:09,270 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:04:09,271 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:04:09,272 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:04:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:09,272 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:04:09,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:09,272 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:04:09,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:09,287 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:04:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:09,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:04:09,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:04:09,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:04:09,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:04:09,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:04:09,404 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,420 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,437 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,456 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,479 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 18 treesize of output 21 [2018-12-24 14:04:09,482 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 21 treesize of output 23 [2018-12-24 14:04:09,485 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 23 treesize of output 33 [2018-12-24 14:04:09,488 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 25 treesize of output 47 [2018-12-24 14:04:09,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:04:09,492 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,512 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,728 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,757 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,766 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,792 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:09,792 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:04:09,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:04:09,820 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:09,845 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2018-12-24 14:04:09,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,913 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 76 [2018-12-24 14:04:09,913 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:09,951 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:09,952 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:36 [2018-12-24 14:04:09,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:09,981 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:04:09,989 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 94 [2018-12-24 14:04:09,991 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:04:10,097 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:04:10,097 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:64 [2018-12-24 14:04:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:10,130 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:04:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:10,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:04:10,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2018-12-24 14:04:10,178 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:04:10,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:04:10,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:04:10,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:04:10,179 INFO L87 Difference]: Start difference. First operand 1877 states and 11071 transitions. Second operand 11 states. [2018-12-24 14:04:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:04:19,798 INFO L93 Difference]: Finished difference Result 2991 states and 17341 transitions. [2018-12-24 14:04:19,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:04:19,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2018-12-24 14:04:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:04:19,806 INFO L225 Difference]: With dead ends: 2991 [2018-12-24 14:04:19,806 INFO L226 Difference]: Without dead ends: 2978 [2018-12-24 14:04:19,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:04:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2018-12-24 14:04:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 2350. [2018-12-24 14:04:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2350 states. [2018-12-24 14:04:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 13866 transitions. [2018-12-24 14:04:27,840 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 13866 transitions. Word has length 8 [2018-12-24 14:04:27,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:04:27,841 INFO L480 AbstractCegarLoop]: Abstraction has 2350 states and 13866 transitions. [2018-12-24 14:04:27,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:04:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 13866 transitions. [2018-12-24 14:04:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:04:27,844 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:04:27,844 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:04:27,845 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:04:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1861146186, now seen corresponding path program 1 times [2018-12-24 14:04:27,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:04:27,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:27,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:27,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:27,846 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:04:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:04:27,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:27,923 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:04:27,923 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-24 14:04:27,924 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [18], [20], [24], [25] [2018-12-24 14:04:27,925 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:04:27,925 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:04:27,927 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:04:27,927 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 5 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:04:27,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:27,927 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:04:27,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:04:27,927 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:04:27,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:27,943 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:04:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:27,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:04:27,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:27,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:04:28,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:04:28,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:04:28,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:04:28,086 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,102 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,116 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,132 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,154 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 18 treesize of output 21 [2018-12-24 14:04:28,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2018-12-24 14:04:28,159 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 23 treesize of output 37 [2018-12-24 14:04:28,162 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 25 treesize of output 51 [2018-12-24 14:04:28,164 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:04:28,165 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,187 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,200 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,210 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,219 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,247 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,247 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:69, output treesize:66 [2018-12-24 14:04:28,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:04:28,281 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,307 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:28,307 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2018-12-24 14:04:28,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 14:04:28,343 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,372 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:28,372 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2018-12-24 14:04:28,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,408 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:04:28,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 94 [2018-12-24 14:04:28,409 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,443 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:28,443 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2018-12-24 14:04:28,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,478 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:04:28,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2018-12-24 14:04:28,480 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,513 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:28,513 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:34 [2018-12-24 14:04:28,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:04:28,548 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:04:28,549 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 96 [2018-12-24 14:04:28,549 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:04:28,582 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:04:28,582 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:46 [2018-12-24 14:04:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:28,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:04:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:04:29,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:04:29,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2018-12-24 14:04:29,294 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:04:29,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-24 14:04:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-24 14:04:29,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:04:29,295 INFO L87 Difference]: Start difference. First operand 2350 states and 13866 transitions. Second operand 14 states. [2018-12-24 14:04:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:04:40,285 INFO L93 Difference]: Finished difference Result 3181 states and 18621 transitions. [2018-12-24 14:04:40,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:04:40,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2018-12-24 14:04:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:04:40,294 INFO L225 Difference]: With dead ends: 3181 [2018-12-24 14:04:40,294 INFO L226 Difference]: Without dead ends: 3179 [2018-12-24 14:04:40,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2018-12-24 14:04:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2018-12-24 14:04:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 2326. [2018-12-24 14:04:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2326 states. [2018-12-24 14:04:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 13718 transitions. [2018-12-24 14:04:48,292 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 13718 transitions. Word has length 8 [2018-12-24 14:04:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:04:48,292 INFO L480 AbstractCegarLoop]: Abstraction has 2326 states and 13718 transitions. [2018-12-24 14:04:48,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-24 14:04:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 13718 transitions. [2018-12-24 14:04:48,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:04:48,296 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:04:48,296 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:04:48,296 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:04:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:04:48,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1477451752, now seen corresponding path program 1 times [2018-12-24 14:04:48,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:04:48,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:48,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:04:48,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:04:48,297 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:04:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:04:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:04:48,356 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:04:48,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-24 14:04:48,356 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:04:48,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-24 14:04:48,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-24 14:04:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:04:48,357 INFO L87 Difference]: Start difference. First operand 2326 states and 13718 transitions. Second operand 5 states. [2018-12-24 14:04:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:04:55,926 INFO L93 Difference]: Finished difference Result 2346 states and 13737 transitions. [2018-12-24 14:04:55,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:04:55,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-12-24 14:04:55,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:04:55,933 INFO L225 Difference]: With dead ends: 2346 [2018-12-24 14:04:55,933 INFO L226 Difference]: Without dead ends: 2337 [2018-12-24 14:04:55,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-24 14:04:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2018-12-24 14:05:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2326. [2018-12-24 14:05:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2326 states. [2018-12-24 14:05:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 13543 transitions. [2018-12-24 14:05:03,905 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 13543 transitions. Word has length 8 [2018-12-24 14:05:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:03,906 INFO L480 AbstractCegarLoop]: Abstraction has 2326 states and 13543 transitions. [2018-12-24 14:05:03,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-24 14:05:03,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 13543 transitions. [2018-12-24 14:05:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:05:03,909 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:03,909 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:03,909 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:03,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:03,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1464330066, now seen corresponding path program 2 times [2018-12-24 14:05:03,909 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:03,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:03,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:03,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:03,910 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:05:04,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:04,028 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:04,028 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:05:04,028 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:05:04,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:04,028 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:04,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:05:04,038 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:05:04,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-24 14:05:04,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:05:04,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:04,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:05:04,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:05:04,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:05:04,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:05:04,207 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,223 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,238 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,253 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,276 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 18 treesize of output 21 [2018-12-24 14:05:04,279 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 21 treesize of output 27 [2018-12-24 14:05:04,281 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 23 treesize of output 37 [2018-12-24 14:05:04,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 51 [2018-12-24 14:05:04,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:05:04,287 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,310 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,323 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,334 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,343 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,371 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,371 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:69, output treesize:66 [2018-12-24 14:05:04,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:05:04,407 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,433 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:04,434 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2018-12-24 14:05:04,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:05:04,469 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,502 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:04,503 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2018-12-24 14:05:04,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,538 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:04,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:05:04,540 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,574 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:04,574 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:34 [2018-12-24 14:05:04,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,613 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:04,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 96 [2018-12-24 14:05:04,614 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,647 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:04,648 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:38 [2018-12-24 14:05:04,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:04,686 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:04,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 96 [2018-12-24 14:05:04,687 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:04,720 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:04,721 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:46 [2018-12-24 14:05:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:04,931 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:05,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:05,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2018-12-24 14:05:05,036 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:05,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-24 14:05:05,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-24 14:05:05,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:05:05,036 INFO L87 Difference]: Start difference. First operand 2326 states and 13543 transitions. Second operand 14 states. [2018-12-24 14:05:13,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:13,866 INFO L93 Difference]: Finished difference Result 2345 states and 13559 transitions. [2018-12-24 14:05:13,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:05:13,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2018-12-24 14:05:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:13,873 INFO L225 Difference]: With dead ends: 2345 [2018-12-24 14:05:13,873 INFO L226 Difference]: Without dead ends: 2338 [2018-12-24 14:05:13,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2018-12-24 14:05:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2018-12-24 14:05:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 473. [2018-12-24 14:05:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2018-12-24 14:05:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 2593 transitions. [2018-12-24 14:05:16,117 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 2593 transitions. Word has length 8 [2018-12-24 14:05:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:16,117 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 2593 transitions. [2018-12-24 14:05:16,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-24 14:05:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 2593 transitions. [2018-12-24 14:05:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:05:16,118 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:16,118 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:16,118 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:16,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1700463206, now seen corresponding path program 1 times [2018-12-24 14:05:16,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:16,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:16,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:05:16,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:16,119 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:05:16,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:16,169 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:16,169 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-24 14:05:16,169 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [24], [26], [27] [2018-12-24 14:05:16,169 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:05:16,170 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:05:16,171 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:05:16,171 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 62 root evaluator evaluations with a maximum evaluation depth of 2. Performed 62 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:05:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:16,172 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:05:16,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:16,172 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:16,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:16,183 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:05:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:16,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:16,194 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 18 treesize of output 21 [2018-12-24 14:05:16,197 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 21 treesize of output 23 [2018-12-24 14:05:16,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,204 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 23 treesize of output 33 [2018-12-24 14:05:16,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,211 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 25 treesize of output 47 [2018-12-24 14:05:16,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 46 [2018-12-24 14:05:16,219 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,236 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,248 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,256 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,266 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,282 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 26 treesize of output 25 [2018-12-24 14:05:16,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,295 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 22 treesize of output 38 [2018-12-24 14:05:16,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,430 INFO L303 Elim1Store]: Index analysis took 113 ms [2018-12-24 14:05:16,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2018-12-24 14:05:16,431 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,476 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,484 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,502 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:16,502 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:44, output treesize:46 [2018-12-24 14:05:16,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,531 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2018-12-24 14:05:16,531 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,539 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,540 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:20 [2018-12-24 14:05:16,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,555 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 50 [2018-12-24 14:05:16,559 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,570 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,571 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:18 [2018-12-24 14:05:16,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 60 [2018-12-24 14:05:16,592 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,608 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:16,609 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:16 [2018-12-24 14:05:16,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:16,635 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 62 [2018-12-24 14:05:16,635 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:16,651 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:16,651 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:18 [2018-12-24 14:05:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:16,666 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:16,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:16,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2018-12-24 14:05:16,727 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:16,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:05:16,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:05:16,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:05:16,728 INFO L87 Difference]: Start difference. First operand 473 states and 2593 transitions. Second operand 11 states. [2018-12-24 14:05:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:19,166 INFO L93 Difference]: Finished difference Result 480 states and 2609 transitions. [2018-12-24 14:05:19,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:05:19,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2018-12-24 14:05:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:19,167 INFO L225 Difference]: With dead ends: 480 [2018-12-24 14:05:19,167 INFO L226 Difference]: Without dead ends: 477 [2018-12-24 14:05:19,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:05:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2018-12-24 14:05:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 158. [2018-12-24 14:05:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-12-24 14:05:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 805 transitions. [2018-12-24 14:05:20,138 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 805 transitions. Word has length 8 [2018-12-24 14:05:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:20,138 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 805 transitions. [2018-12-24 14:05:20,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:05:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 805 transitions. [2018-12-24 14:05:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:05:20,138 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:20,138 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:20,139 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1702729308, now seen corresponding path program 1 times [2018-12-24 14:05:20,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:20,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:20,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:20,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:20,139 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:05:20,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:20,189 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:20,189 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-24 14:05:20,189 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [20], [24], [26], [28], [29] [2018-12-24 14:05:20,190 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:05:20,190 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:05:20,191 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:05:20,191 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:05:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:20,192 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:05:20,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:20,192 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:20,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:20,201 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:05:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:20,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:20,208 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 18 treesize of output 21 [2018-12-24 14:05:20,211 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 21 treesize of output 23 [2018-12-24 14:05:20,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,218 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 23 treesize of output 33 [2018-12-24 14:05:20,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,225 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 25 treesize of output 47 [2018-12-24 14:05:20,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:05:20,234 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,258 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,271 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,281 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,290 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,310 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 43 treesize of output 39 [2018-12-24 14:05:20,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:05:20,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:05:20,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:05:20,403 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,417 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,430 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,445 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,471 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:20,471 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:05:20,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:05:20,507 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,523 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:20,523 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:05:20,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2018-12-24 14:05:20,546 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:20,566 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:27 [2018-12-24 14:05:20,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:20,591 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:20,591 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 73 [2018-12-24 14:05:20,592 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:20,613 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. [2018-12-24 14:05:20,614 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2018-12-24 14:05:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:20,632 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:20,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:20,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2018-12-24 14:05:20,682 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:20,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:05:20,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:05:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:05:20,683 INFO L87 Difference]: Start difference. First operand 158 states and 805 transitions. Second operand 9 states. [2018-12-24 14:05:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:22,555 INFO L93 Difference]: Finished difference Result 250 states and 1244 transitions. [2018-12-24 14:05:22,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:05:22,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-12-24 14:05:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:22,557 INFO L225 Difference]: With dead ends: 250 [2018-12-24 14:05:22,557 INFO L226 Difference]: Without dead ends: 243 [2018-12-24 14:05:22,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:05:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-24 14:05:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 217. [2018-12-24 14:05:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-12-24 14:05:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 1122 transitions. [2018-12-24 14:05:24,154 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 1122 transitions. Word has length 8 [2018-12-24 14:05:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:24,154 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 1122 transitions. [2018-12-24 14:05:24,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:05:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 1122 transitions. [2018-12-24 14:05:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:05:24,155 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:24,155 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:24,155 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1689800014, now seen corresponding path program 1 times [2018-12-24 14:05:24,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:24,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:24,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:24,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:24,156 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:05:24,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:24,267 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:24,267 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-24 14:05:24,267 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [26], [28], [29] [2018-12-24 14:05:24,268 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:05:24,268 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:05:24,270 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:05:24,270 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:05:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:24,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:05:24,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:24,271 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:24,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:24,280 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:05:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:24,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:24,287 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 18 treesize of output 21 [2018-12-24 14:05:24,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:05:24,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,296 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 23 treesize of output 33 [2018-12-24 14:05:24,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,303 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 25 treesize of output 47 [2018-12-24 14:05:24,313 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 46 [2018-12-24 14:05:24,313 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,329 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,342 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,352 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,362 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2018-12-24 14:05:24,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 38 [2018-12-24 14:05:24,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2018-12-24 14:05:24,420 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,428 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,436 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:24,453 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:44, output treesize:46 [2018-12-24 14:05:24,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,483 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2018-12-24 14:05:24,483 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,492 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,492 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:20 [2018-12-24 14:05:24,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,509 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 50 [2018-12-24 14:05:24,510 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:24,524 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2018-12-24 14:05:24,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:24,545 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:24,545 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 56 [2018-12-24 14:05:24,546 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:24,561 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:24,561 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:22 [2018-12-24 14:05:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:24,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:24,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:24,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:05:24,621 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:24,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:05:24,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:05:24,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:05:24,622 INFO L87 Difference]: Start difference. First operand 217 states and 1122 transitions. Second operand 10 states. [2018-12-24 14:05:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:27,944 INFO L93 Difference]: Finished difference Result 372 states and 1862 transitions. [2018-12-24 14:05:27,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:05:27,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2018-12-24 14:05:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:27,946 INFO L225 Difference]: With dead ends: 372 [2018-12-24 14:05:27,946 INFO L226 Difference]: Without dead ends: 362 [2018-12-24 14:05:27,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:05:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-12-24 14:05:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 274. [2018-12-24 14:05:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-24 14:05:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 1432 transitions. [2018-12-24 14:05:30,353 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 1432 transitions. Word has length 8 [2018-12-24 14:05:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:30,353 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 1432 transitions. [2018-12-24 14:05:30,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:05:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 1432 transitions. [2018-12-24 14:05:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:05:30,354 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:30,354 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:30,354 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:30,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:30,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1048110876, now seen corresponding path program 2 times [2018-12-24 14:05:30,355 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:30,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:30,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:30,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:30,356 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:30,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:30,422 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:30,423 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:05:30,423 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:05:30,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:30,423 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:30,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:05:30,432 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:05:30,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:05:30,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:05:30,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:30,441 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 18 treesize of output 21 [2018-12-24 14:05:30,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:05:30,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,451 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 23 treesize of output 33 [2018-12-24 14:05:30,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:05:30,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:05:30,468 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,492 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,506 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,516 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,526 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:05:30,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:05:30,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:05:30,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:05:30,639 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,653 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,666 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,681 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,707 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:30,707 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:05:30,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:05:30,730 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,756 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:30,756 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:05:30,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,784 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:30,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 80 [2018-12-24 14:05:30,793 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:05:30,880 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:05:30,880 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:72 [2018-12-24 14:05:30,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:30,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:05:30,926 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:30,948 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:30,948 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:25 [2018-12-24 14:05:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:30,965 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:31,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:31,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:05:31,033 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:31,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:05:31,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:05:31,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:05:31,034 INFO L87 Difference]: Start difference. First operand 274 states and 1432 transitions. Second operand 10 states. [2018-12-24 14:05:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:34,095 INFO L93 Difference]: Finished difference Result 332 states and 1700 transitions. [2018-12-24 14:05:34,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:05:34,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2018-12-24 14:05:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:34,097 INFO L225 Difference]: With dead ends: 332 [2018-12-24 14:05:34,097 INFO L226 Difference]: Without dead ends: 325 [2018-12-24 14:05:34,097 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:05:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-12-24 14:05:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 285. [2018-12-24 14:05:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-12-24 14:05:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 1489 transitions. [2018-12-24 14:05:36,603 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 1489 transitions. Word has length 8 [2018-12-24 14:05:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:36,603 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 1489 transitions. [2018-12-24 14:05:36,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:05:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 1489 transitions. [2018-12-24 14:05:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:05:36,604 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:36,604 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:36,604 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1051804960, now seen corresponding path program 1 times [2018-12-24 14:05:36,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:36,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:05:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:36,605 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:36,756 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-12-24 14:05:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:05:36,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:36,787 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:36,788 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-24 14:05:36,788 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [20], [24], [26], [28], [29] [2018-12-24 14:05:36,789 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:05:36,789 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:05:36,791 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:05:36,791 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:05:36,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:36,791 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:05:36,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:36,792 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:36,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:36,806 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:05:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:36,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:36,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:05:36,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:05:36,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:05:36,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:36,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:05:36,907 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:36,922 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:36,936 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:36,951 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:36,971 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 18 treesize of output 21 [2018-12-24 14:05:36,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2018-12-24 14:05:36,977 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 23 treesize of output 33 [2018-12-24 14:05:36,980 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 25 treesize of output 47 [2018-12-24 14:05:36,984 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 27 treesize of output 62 [2018-12-24 14:05:36,984 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:37,005 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:37,016 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:37,026 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:37,035 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:37,061 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:37,061 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:05:37,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 51 [2018-12-24 14:05:37,106 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:37,124 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:37,124 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:05:37,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,150 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:37,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2018-12-24 14:05:37,151 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:37,171 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:37,171 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:29 [2018-12-24 14:05:37,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:37,197 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:37,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2018-12-24 14:05:37,198 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:37,217 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:37,217 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:33 [2018-12-24 14:05:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:37,236 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:37,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:37,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:05:37,300 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:37,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:05:37,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:05:37,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:05:37,301 INFO L87 Difference]: Start difference. First operand 285 states and 1489 transitions. Second operand 10 states. [2018-12-24 14:05:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:40,021 INFO L93 Difference]: Finished difference Result 294 states and 1507 transitions. [2018-12-24 14:05:40,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:05:40,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2018-12-24 14:05:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:40,023 INFO L225 Difference]: With dead ends: 294 [2018-12-24 14:05:40,023 INFO L226 Difference]: Without dead ends: 287 [2018-12-24 14:05:40,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:05:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-12-24 14:05:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2018-12-24 14:05:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-12-24 14:05:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 1484 transitions. [2018-12-24 14:05:42,520 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 1484 transitions. Word has length 8 [2018-12-24 14:05:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:42,520 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 1484 transitions. [2018-12-24 14:05:42,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:05:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 1484 transitions. [2018-12-24 14:05:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:05:42,521 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:42,521 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:42,521 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:42,521 INFO L82 PathProgramCache]: Analyzing trace with hash -944676524, now seen corresponding path program 1 times [2018-12-24 14:05:42,521 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:42,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:42,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:42,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:42,522 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:05:42,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:42,616 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:42,616 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-24 14:05:42,616 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [20], [24], [26], [28], [29] [2018-12-24 14:05:42,617 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:05:42,617 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:05:42,619 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:05:42,619 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:05:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:42,619 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:05:42,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:42,619 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:42,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:42,627 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:05:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:42,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:42,635 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 18 treesize of output 21 [2018-12-24 14:05:42,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:05:42,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,644 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 23 treesize of output 33 [2018-12-24 14:05:42,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,652 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 25 treesize of output 47 [2018-12-24 14:05:42,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,660 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 27 treesize of output 62 [2018-12-24 14:05:42,661 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:42,685 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:42,699 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:42,709 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:42,719 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:42,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:05:42,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,754 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 36 treesize of output 49 [2018-12-24 14:05:42,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:42,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:05:43,255 WARN L181 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2018-12-24 14:05:43,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:05:43,280 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:43,292 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:43,306 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:43,321 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:43,347 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:43,347 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:05:43,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:05:43,380 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:43,405 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:43,405 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2018-12-24 14:05:43,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:05:43,447 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:05:43,541 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:05:43,541 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:74 [2018-12-24 14:05:43,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,644 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:43,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,646 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 41 treesize of output 69 [2018-12-24 14:05:43,646 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:43,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:43,701 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:43,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:05:43,702 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:43,749 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:05:43,749 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:92, output treesize:70 [2018-12-24 14:05:43,928 WARN L181 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2018-12-24 14:05:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:43,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:43,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:43,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2018-12-24 14:05:43,991 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:43,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:05:43,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:05:43,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:05:43,992 INFO L87 Difference]: Start difference. First operand 284 states and 1484 transitions. Second operand 11 states. [2018-12-24 14:05:44,801 WARN L181 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2018-12-24 14:05:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:47,983 INFO L93 Difference]: Finished difference Result 364 states and 1818 transitions. [2018-12-24 14:05:47,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:05:47,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2018-12-24 14:05:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:47,985 INFO L225 Difference]: With dead ends: 364 [2018-12-24 14:05:47,986 INFO L226 Difference]: Without dead ends: 357 [2018-12-24 14:05:47,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:05:47,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-12-24 14:05:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 283. [2018-12-24 14:05:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-12-24 14:05:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 1479 transitions. [2018-12-24 14:05:50,632 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 1479 transitions. Word has length 8 [2018-12-24 14:05:50,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:50,633 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 1479 transitions. [2018-12-24 14:05:50,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:05:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 1479 transitions. [2018-12-24 14:05:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:05:50,633 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:50,633 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:50,634 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:50,634 INFO L82 PathProgramCache]: Analyzing trace with hash -937288356, now seen corresponding path program 1 times [2018-12-24 14:05:50,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:50,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:50,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:50,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:50,634 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:51,020 WARN L181 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-12-24 14:05:51,349 WARN L181 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-12-24 14:05:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:05:51,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:51,359 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:51,360 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-24 14:05:51,360 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [20], [24], [26], [28], [29] [2018-12-24 14:05:51,361 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:05:51,361 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:05:51,363 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:05:51,363 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:05:51,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:51,364 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:05:51,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:51,364 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:51,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:51,373 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:05:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:51,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:51,380 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 18 treesize of output 21 [2018-12-24 14:05:51,384 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 21 treesize of output 23 [2018-12-24 14:05:51,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,389 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 23 treesize of output 33 [2018-12-24 14:05:51,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,397 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 25 treesize of output 47 [2018-12-24 14:05:51,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:05:51,406 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,431 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,444 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,454 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,464 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:05:51,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:05:51,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:05:51,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:05:51,575 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,589 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,602 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,617 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,643 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:51,643 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:05:51,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,686 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 51 [2018-12-24 14:05:51,686 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:51,736 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:05:51,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,761 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 65 [2018-12-24 14:05:51,761 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,781 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:51,782 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:25 [2018-12-24 14:05:51,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:51,809 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:51,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2018-12-24 14:05:51,810 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:51,832 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:51,832 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2018-12-24 14:05:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:51,851 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:51,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:51,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2018-12-24 14:05:51,898 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:51,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:05:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:05:51,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:05:51,899 INFO L87 Difference]: Start difference. First operand 283 states and 1479 transitions. Second operand 9 states. [2018-12-24 14:05:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:05:55,044 INFO L93 Difference]: Finished difference Result 319 states and 1617 transitions. [2018-12-24 14:05:55,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:05:55,045 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-12-24 14:05:55,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:05:55,046 INFO L225 Difference]: With dead ends: 319 [2018-12-24 14:05:55,046 INFO L226 Difference]: Without dead ends: 312 [2018-12-24 14:05:55,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:05:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-12-24 14:05:58,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2018-12-24 14:05:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-24 14:05:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1600 transitions. [2018-12-24 14:05:58,119 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1600 transitions. Word has length 8 [2018-12-24 14:05:58,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:05:58,119 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 1600 transitions. [2018-12-24 14:05:58,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:05:58,120 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1600 transitions. [2018-12-24 14:05:58,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:05:58,120 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:05:58,120 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:05:58,120 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:05:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:58,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1115262138, now seen corresponding path program 1 times [2018-12-24 14:05:58,121 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:05:58,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:58,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:58,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:05:58,121 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:05:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:05:58,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:58,225 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:05:58,225 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 9 with the following transitions: [2018-12-24 14:05:58,225 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [24], [26], [28], [29] [2018-12-24 14:05:58,226 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:05:58,226 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:05:58,228 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:05:58,228 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:05:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:05:58,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:05:58,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:05:58,228 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:05:58,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:05:58,238 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:05:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:05:58,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:05:58,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:05:58,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:05:58,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:05:58,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:05:58,348 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,365 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,380 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,398 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:05:58,426 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 21 treesize of output 23 [2018-12-24 14:05:58,429 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 23 treesize of output 33 [2018-12-24 14:05:58,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:05:58,436 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 27 treesize of output 62 [2018-12-24 14:05:58,436 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,458 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,469 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,479 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,488 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,515 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:05:58,515 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:05:58,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:05:58,566 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:05:58,654 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2018-12-24 14:05:58,654 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:94 [2018-12-24 14:05:58,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,744 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 67 [2018-12-24 14:05:58,745 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 88 [2018-12-24 14:05:58,809 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,853 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 2 xjuncts. [2018-12-24 14:05:58,854 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:108, output treesize:68 [2018-12-24 14:05:58,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,907 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:58,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:05:58,908 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:58,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,966 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:05:58,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:05:58,968 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 65 [2018-12-24 14:05:58,968 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:05:59,007 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:05:59,007 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:88, output treesize:70 [2018-12-24 14:05:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:59,056 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:05:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:05:59,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:05:59,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2018-12-24 14:05:59,112 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:05:59,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:05:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:05:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:05:59,113 INFO L87 Difference]: Start difference. First operand 304 states and 1600 transitions. Second operand 11 states. [2018-12-24 14:06:00,483 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2018-12-24 14:06:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:06:03,608 INFO L93 Difference]: Finished difference Result 392 states and 1929 transitions. [2018-12-24 14:06:03,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:06:03,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2018-12-24 14:06:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:06:03,609 INFO L225 Difference]: With dead ends: 392 [2018-12-24 14:06:03,610 INFO L226 Difference]: Without dead ends: 386 [2018-12-24 14:06:03,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:06:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-12-24 14:06:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 315. [2018-12-24 14:06:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-12-24 14:06:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 1665 transitions. [2018-12-24 14:06:06,889 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 1665 transitions. Word has length 8 [2018-12-24 14:06:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:06:06,889 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 1665 transitions. [2018-12-24 14:06:06,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:06:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 1665 transitions. [2018-12-24 14:06:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-24 14:06:06,890 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:06:06,890 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:06:06,890 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:06:06,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:06,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1098577192, now seen corresponding path program 1 times [2018-12-24 14:06:06,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:06:06,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:06,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:06:06,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:06,891 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:06:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:06:06,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:06:06,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-24 14:06:06,956 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:06:06,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-24 14:06:06,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-24 14:06:06,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:06:06,957 INFO L87 Difference]: Start difference. First operand 315 states and 1665 transitions. Second operand 5 states. [2018-12-24 14:06:10,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:06:10,029 INFO L93 Difference]: Finished difference Result 320 states and 1669 transitions. [2018-12-24 14:06:10,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:06:10,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-12-24 14:06:10,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:06:10,031 INFO L225 Difference]: With dead ends: 320 [2018-12-24 14:06:10,031 INFO L226 Difference]: Without dead ends: 315 [2018-12-24 14:06:10,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-24 14:06:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-12-24 14:06:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2018-12-24 14:06:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-12-24 14:06:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1654 transitions. [2018-12-24 14:06:13,275 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1654 transitions. Word has length 8 [2018-12-24 14:06:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:06:13,275 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 1654 transitions. [2018-12-24 14:06:13,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-24 14:06:13,275 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1654 transitions. [2018-12-24 14:06:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:06:13,275 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:06:13,276 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:06:13,276 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:06:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash 95484720, now seen corresponding path program 3 times [2018-12-24 14:06:13,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:06:13,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:13,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:06:13,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:13,277 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:06:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:06:13,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:13,383 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:06:13,383 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:06:13,383 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:06:13,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:13,383 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:06:13,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:06:13,391 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:06:13,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:06:13,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:06:13,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:06:13,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:06:13,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:06:13,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:06:13,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:06:13,493 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,507 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,519 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,535 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,554 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 18 treesize of output 21 [2018-12-24 14:06:13,557 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 21 treesize of output 23 [2018-12-24 14:06:13,559 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 23 treesize of output 33 [2018-12-24 14:06:13,562 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 25 treesize of output 47 [2018-12-24 14:06:13,566 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 27 treesize of output 62 [2018-12-24 14:06:13,566 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,586 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,598 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,607 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,614 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,640 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:13,641 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:06:13,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:06:13,668 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,692 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:13,692 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2018-12-24 14:06:13,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 74 [2018-12-24 14:06:13,722 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,751 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:13,751 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:46 [2018-12-24 14:06:13,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:06:13,793 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:06:13,885 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:06:13,886 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:68 [2018-12-24 14:06:13,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:13,935 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:06:13,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 73 [2018-12-24 14:06:13,936 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:13,957 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:13,958 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2018-12-24 14:06:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:13,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:06:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:14,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:06:14,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:06:14,058 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:06:14,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:06:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:06:14,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:06:14,058 INFO L87 Difference]: Start difference. First operand 314 states and 1654 transitions. Second operand 12 states. [2018-12-24 14:06:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:06:20,655 INFO L93 Difference]: Finished difference Result 601 states and 3111 transitions. [2018-12-24 14:06:20,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:06:20,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2018-12-24 14:06:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:06:20,657 INFO L225 Difference]: With dead ends: 601 [2018-12-24 14:06:20,657 INFO L226 Difference]: Without dead ends: 591 [2018-12-24 14:06:20,657 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2018-12-24 14:06:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-12-24 14:06:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 448. [2018-12-24 14:06:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-12-24 14:06:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 2380 transitions. [2018-12-24 14:06:26,074 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 2380 transitions. Word has length 9 [2018-12-24 14:06:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:06:26,074 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 2380 transitions. [2018-12-24 14:06:26,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:06:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 2380 transitions. [2018-12-24 14:06:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:06:26,075 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:06:26,075 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:06:26,075 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:06:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:26,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1988764338, now seen corresponding path program 1 times [2018-12-24 14:06:26,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:06:26,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:26,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:06:26,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:26,076 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:06:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:06:26,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:26,179 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:06:26,179 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 10 with the following transitions: [2018-12-24 14:06:26,179 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [20], [24], [26], [28], [30], [31] [2018-12-24 14:06:26,180 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:06:26,180 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:06:26,182 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:06:26,182 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:06:26,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:26,183 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:06:26,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:26,183 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:06:26,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:06:26,191 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:06:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:26,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:06:26,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:06:26,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:06:26,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:06:26,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:06:26,303 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,319 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,336 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,354 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,376 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 18 treesize of output 21 [2018-12-24 14:06:26,380 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 21 treesize of output 23 [2018-12-24 14:06:26,383 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 23 treesize of output 33 [2018-12-24 14:06:26,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:06:26,389 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 27 treesize of output 62 [2018-12-24 14:06:26,389 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,411 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,423 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,433 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,442 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,468 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:26,468 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:06:26,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:06:26,493 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,516 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:26,516 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:06:26,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 76 [2018-12-24 14:06:26,547 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:26,574 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:26,574 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:36 [2018-12-24 14:06:26,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,605 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:06:26,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:26,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 93 [2018-12-24 14:06:26,615 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:06:26,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:06:26,709 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:64 [2018-12-24 14:06:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:26,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:06:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:26,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:06:26,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:06:26,798 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:06:26,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:06:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:06:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:06:26,798 INFO L87 Difference]: Start difference. First operand 448 states and 2380 transitions. Second operand 10 states. [2018-12-24 14:06:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:06:36,827 INFO L93 Difference]: Finished difference Result 731 states and 3887 transitions. [2018-12-24 14:06:36,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:06:36,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-12-24 14:06:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:06:36,829 INFO L225 Difference]: With dead ends: 731 [2018-12-24 14:06:36,829 INFO L226 Difference]: Without dead ends: 718 [2018-12-24 14:06:36,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:06:36,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2018-12-24 14:06:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 399. [2018-12-24 14:06:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-12-24 14:06:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 2082 transitions. [2018-12-24 14:06:45,658 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 2082 transitions. Word has length 9 [2018-12-24 14:06:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:06:45,658 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 2082 transitions. [2018-12-24 14:06:45,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:06:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 2082 transitions. [2018-12-24 14:06:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:06:45,659 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:06:45,659 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:06:45,659 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:06:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:45,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2086595996, now seen corresponding path program 1 times [2018-12-24 14:06:45,660 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:06:45,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:45,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:06:45,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:06:45,661 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:06:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:06:45,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:45,792 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:06:45,792 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 10 with the following transitions: [2018-12-24 14:06:45,792 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [20], [24], [26], [28], [29] [2018-12-24 14:06:45,793 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:06:45,793 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:06:45,795 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:06:45,795 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:06:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:06:45,796 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:06:45,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:06:45,796 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:06:45,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:06:45,819 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:06:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:06:45,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:06:45,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:06:45,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:06:45,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:06:45,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:45,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:06:45,963 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:45,978 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:45,993 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,011 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,035 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 18 treesize of output 21 [2018-12-24 14:06:46,039 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 21 treesize of output 23 [2018-12-24 14:06:46,042 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 23 treesize of output 33 [2018-12-24 14:06:46,045 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 25 treesize of output 47 [2018-12-24 14:06:46,048 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 27 treesize of output 62 [2018-12-24 14:06:46,048 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,082 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,094 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,103 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,112 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,138 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:46,138 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:06:46,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:06:46,185 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,200 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,201 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:33 [2018-12-24 14:06:46,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 59 [2018-12-24 14:06:46,232 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,250 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:46,250 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2018-12-24 14:06:46,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,279 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:06:46,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2018-12-24 14:06:46,280 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,300 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:46,301 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:27 [2018-12-24 14:06:46,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:06:46,329 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:06:46,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 73 [2018-12-24 14:06:46,330 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:06:46,353 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:06:46,353 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:35 [2018-12-24 14:06:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:46,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:06:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:06:46,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:06:46,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:06:46,463 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:06:46,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:06:46,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:06:46,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:06:46,464 INFO L87 Difference]: Start difference. First operand 399 states and 2082 transitions. Second operand 12 states. [2018-12-24 14:06:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:06:56,760 INFO L93 Difference]: Finished difference Result 480 states and 2456 transitions. [2018-12-24 14:06:56,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:06:56,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2018-12-24 14:06:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:06:56,762 INFO L225 Difference]: With dead ends: 480 [2018-12-24 14:06:56,762 INFO L226 Difference]: Without dead ends: 473 [2018-12-24 14:06:56,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2018-12-24 14:06:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2018-12-24 14:07:00,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 193. [2018-12-24 14:07:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-12-24 14:07:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 982 transitions. [2018-12-24 14:07:00,179 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 982 transitions. Word has length 9 [2018-12-24 14:07:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:07:00,180 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 982 transitions. [2018-12-24 14:07:00,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:07:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 982 transitions. [2018-12-24 14:07:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:07:00,181 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:07:00,181 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:07:00,181 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:07:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:00,181 INFO L82 PathProgramCache]: Analyzing trace with hash 958709548, now seen corresponding path program 1 times [2018-12-24 14:07:00,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:07:00,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:00,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:00,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:00,182 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:07:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:00,434 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-12-24 14:07:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:07:00,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:00,503 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:07:00,503 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 10 with the following transitions: [2018-12-24 14:07:00,503 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [24], [26], [28], [30], [31] [2018-12-24 14:07:00,506 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:07:00,506 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:07:00,508 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:07:00,508 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:07:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:00,509 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:07:00,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:00,509 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:07:00,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:00,532 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:07:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:00,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:07:00,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:07:00,595 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 21 treesize of output 23 [2018-12-24 14:07:00,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,599 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 23 treesize of output 33 [2018-12-24 14:07:00,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,607 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 25 treesize of output 47 [2018-12-24 14:07:00,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:07:00,616 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,640 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,653 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,663 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,672 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,691 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 43 treesize of output 39 [2018-12-24 14:07:00,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,707 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 36 treesize of output 49 [2018-12-24 14:07:00,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:07:00,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,783 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:07:00,783 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,797 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,810 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,825 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:00,851 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:07:00,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:07:00,897 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,914 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:00,914 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:07:00,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2018-12-24 14:07:00,942 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:00,961 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:00,961 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:27 [2018-12-24 14:07:00,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,986 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:00,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:00,987 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 76 [2018-12-24 14:07:00,988 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:01,010 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:01,010 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:25 [2018-12-24 14:07:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:01,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:07:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:01,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:07:01,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:07:01,079 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:07:01,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:07:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:07:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:07:01,080 INFO L87 Difference]: Start difference. First operand 193 states and 982 transitions. Second operand 10 states. [2018-12-24 14:07:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:07:06,491 INFO L93 Difference]: Finished difference Result 258 states and 1245 transitions. [2018-12-24 14:07:06,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:07:06,491 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-12-24 14:07:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:07:06,492 INFO L225 Difference]: With dead ends: 258 [2018-12-24 14:07:06,493 INFO L226 Difference]: Without dead ends: 243 [2018-12-24 14:07:06,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:07:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-24 14:07:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 219. [2018-12-24 14:07:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-24 14:07:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 1113 transitions. [2018-12-24 14:07:11,141 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 1113 transitions. Word has length 9 [2018-12-24 14:07:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:07:11,141 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 1113 transitions. [2018-12-24 14:07:11,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:07:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 1113 transitions. [2018-12-24 14:07:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:07:11,142 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:07:11,143 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:07:11,143 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:07:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1629971288, now seen corresponding path program 1 times [2018-12-24 14:07:11,143 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:07:11,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:11,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:11,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:11,144 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:07:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:07:11,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:11,288 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:07:11,288 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 10 with the following transitions: [2018-12-24 14:07:11,288 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [20], [24], [26], [28], [29] [2018-12-24 14:07:11,289 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:07:11,289 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:07:11,291 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:07:11,291 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:07:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:11,292 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:07:11,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:11,292 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:07:11,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:11,301 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:07:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:11,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:07:11,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:07:11,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:07:11,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:07:11,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,325 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 25 treesize of output 47 [2018-12-24 14:07:11,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,331 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:07:11,334 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,378 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,390 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,401 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,410 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:07:11,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:07:11,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:07:11,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:07:11,531 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,545 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,558 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,573 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,599 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:61, output treesize:62 [2018-12-24 14:07:11,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:07:11,635 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,661 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:11,661 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:46 [2018-12-24 14:07:11,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,696 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:11,704 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 80 [2018-12-24 14:07:11,705 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:07:11,793 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2018-12-24 14:07:11,793 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:72 [2018-12-24 14:07:11,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,837 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:11,838 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 39 treesize of output 53 [2018-12-24 14:07:11,838 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 90 [2018-12-24 14:07:11,893 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:11,945 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 2 xjuncts. [2018-12-24 14:07:11,945 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:92, output treesize:68 [2018-12-24 14:07:11,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:11,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,006 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:12,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 102 [2018-12-24 14:07:12,008 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:12,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:12,087 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:12,087 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 63 [2018-12-24 14:07:12,088 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:12,127 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:07:12,127 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:90, output treesize:70 [2018-12-24 14:07:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:12,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:07:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:12,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:07:12,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:07:12,235 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:07:12,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:07:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:07:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:07:12,236 INFO L87 Difference]: Start difference. First operand 219 states and 1113 transitions. Second operand 12 states. [2018-12-24 14:07:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:07:18,565 INFO L93 Difference]: Finished difference Result 295 states and 1406 transitions. [2018-12-24 14:07:18,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:07:18,566 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2018-12-24 14:07:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:07:18,567 INFO L225 Difference]: With dead ends: 295 [2018-12-24 14:07:18,567 INFO L226 Difference]: Without dead ends: 284 [2018-12-24 14:07:18,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:07:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-12-24 14:07:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 225. [2018-12-24 14:07:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-12-24 14:07:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1147 transitions. [2018-12-24 14:07:23,490 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1147 transitions. Word has length 9 [2018-12-24 14:07:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:07:23,490 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1147 transitions. [2018-12-24 14:07:23,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:07:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1147 transitions. [2018-12-24 14:07:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:07:23,491 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:07:23,491 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:07:23,491 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:07:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash 894315494, now seen corresponding path program 1 times [2018-12-24 14:07:23,491 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:07:23,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:23,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:23,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:23,492 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:07:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:23,670 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 9 [2018-12-24 14:07:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:07:23,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:23,713 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:07:23,713 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 10 with the following transitions: [2018-12-24 14:07:23,713 INFO L207 CegarAbsIntRunner]: [0], [10], [20], [24], [26], [28], [30], [31] [2018-12-24 14:07:23,714 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:07:23,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:07:23,716 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:07:23,716 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:07:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:23,716 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:07:23,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:23,717 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:07:23,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:23,724 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:07:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:23,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:07:23,733 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 18 treesize of output 21 [2018-12-24 14:07:23,736 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 21 treesize of output 23 [2018-12-24 14:07:23,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,742 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 23 treesize of output 33 [2018-12-24 14:07:23,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,749 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 25 treesize of output 47 [2018-12-24 14:07:23,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:07:23,758 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:23,783 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:23,794 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:23,803 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:23,812 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:23,831 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 43 treesize of output 39 [2018-12-24 14:07:23,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:07:23,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:07:23,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:23,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:07:23,926 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:23,940 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:23,953 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:23,968 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:23,994 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:23,994 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:61, output treesize:62 [2018-12-24 14:07:24,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,013 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 [2018-12-24 14:07:24,014 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:24,039 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:24,040 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:07:24,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:07:24,072 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:07:24,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:07:24,165 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:72 [2018-12-24 14:07:24,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:24,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2018-12-24 14:07:24,229 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:24,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:24,255 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:25 [2018-12-24 14:07:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:24,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:07:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:24,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:07:24,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:07:24,334 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:07:24,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:07:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:07:24,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:07:24,335 INFO L87 Difference]: Start difference. First operand 225 states and 1147 transitions. Second operand 10 states. [2018-12-24 14:07:31,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:07:31,450 INFO L93 Difference]: Finished difference Result 328 states and 1595 transitions. [2018-12-24 14:07:31,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:07:31,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-12-24 14:07:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:07:31,451 INFO L225 Difference]: With dead ends: 328 [2018-12-24 14:07:31,451 INFO L226 Difference]: Without dead ends: 315 [2018-12-24 14:07:31,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:07:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-12-24 14:07:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 258. [2018-12-24 14:07:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-12-24 14:07:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 1289 transitions. [2018-12-24 14:07:38,425 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 1289 transitions. Word has length 9 [2018-12-24 14:07:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:07:38,426 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 1289 transitions. [2018-12-24 14:07:38,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:07:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 1289 transitions. [2018-12-24 14:07:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:07:38,426 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:07:38,427 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:07:38,427 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:07:38,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:38,427 INFO L82 PathProgramCache]: Analyzing trace with hash 774869436, now seen corresponding path program 1 times [2018-12-24 14:07:38,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:07:38,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:38,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:38,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:38,428 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:07:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:07:38,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:38,543 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:07:38,543 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 10 with the following transitions: [2018-12-24 14:07:38,543 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [24], [26], [28], [30], [31] [2018-12-24 14:07:38,544 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:07:38,544 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:07:38,545 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:07:38,545 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:07:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:38,546 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:07:38,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:38,546 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:07:38,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:38,563 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:07:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:38,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:07:38,749 WARN L181 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-12-24 14:07:38,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:07:38,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:07:38,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:07:38,907 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:38,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:07:38,914 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:38,930 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:38,948 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:38,967 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:38,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:07:38,994 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 21 treesize of output 27 [2018-12-24 14:07:38,996 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 23 treesize of output 37 [2018-12-24 14:07:38,998 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 25 treesize of output 51 [2018-12-24 14:07:39,000 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:07:39,001 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:39,024 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:39,037 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:39,047 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:39,056 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:39,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:39,083 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:69, output treesize:66 [2018-12-24 14:07:39,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:07:39,117 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:39,142 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:39,142 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:07:39,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:07:39,175 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:39,205 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:39,205 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2018-12-24 14:07:39,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,238 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:39,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:39,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:07:39,240 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:39,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:39,274 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2018-12-24 14:07:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:39,299 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:07:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:39,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:07:39,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:07:39,355 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:07:39,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:07:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:07:39,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:07:39,355 INFO L87 Difference]: Start difference. First operand 258 states and 1289 transitions. Second operand 10 states. [2018-12-24 14:07:48,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:07:48,881 INFO L93 Difference]: Finished difference Result 326 states and 1564 transitions. [2018-12-24 14:07:48,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:07:48,882 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-12-24 14:07:48,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:07:48,883 INFO L225 Difference]: With dead ends: 326 [2018-12-24 14:07:48,883 INFO L226 Difference]: Without dead ends: 313 [2018-12-24 14:07:48,883 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:07:48,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-12-24 14:07:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 284. [2018-12-24 14:07:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-12-24 14:07:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 1425 transitions. [2018-12-24 14:07:57,419 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 1425 transitions. Word has length 9 [2018-12-24 14:07:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:07:57,420 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 1425 transitions. [2018-12-24 14:07:57,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:07:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 1425 transitions. [2018-12-24 14:07:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:07:57,420 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:07:57,420 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:07:57,421 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:07:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:57,421 INFO L82 PathProgramCache]: Analyzing trace with hash -561287958, now seen corresponding path program 1 times [2018-12-24 14:07:57,421 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:07:57,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:57,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:57,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:07:57,421 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:07:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-24 14:07:57,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:57,511 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:07:57,511 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 10 with the following transitions: [2018-12-24 14:07:57,511 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [20], [24], [26], [28], [29] [2018-12-24 14:07:57,512 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:07:57,512 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:07:57,513 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:07:57,513 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:07:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:07:57,514 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:07:57,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:07:57,514 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:07:57,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:07:57,531 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:07:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:07:57,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:07:57,567 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 18 treesize of output 21 [2018-12-24 14:07:57,603 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 21 treesize of output 23 [2018-12-24 14:07:57,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:57,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:57,705 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 23 treesize of output 33 [2018-12-24 14:07:57,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:57,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:57,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:57,820 INFO L303 Elim1Store]: Index analysis took 114 ms [2018-12-24 14:07:57,821 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 25 treesize of output 47 [2018-12-24 14:07:57,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:57,907 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:57,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:57,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:57,956 INFO L303 Elim1Store]: Index analysis took 134 ms [2018-12-24 14:07:57,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:07:57,957 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:57,981 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:57,994 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,004 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,015 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:07:58,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:07:58,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:07:58,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:07:58,125 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,140 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,153 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,168 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,194 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:58,194 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:07:58,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:07:58,227 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:07:58,315 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:07:58,315 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:92 [2018-12-24 14:07:58,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,363 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:07:58,364 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 58 [2018-12-24 14:07:58,364 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,383 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:58,384 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:31 [2018-12-24 14:07:58,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 61 [2018-12-24 14:07:58,408 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,426 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:58,426 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:29 [2018-12-24 14:07:58,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:07:58,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 81 [2018-12-24 14:07:58,456 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:07:58,481 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:07:58,481 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:29 [2018-12-24 14:07:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:58,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:07:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:07:58,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:07:58,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2018-12-24 14:07:58,565 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:07:58,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:07:58,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:07:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:07:58,566 INFO L87 Difference]: Start difference. First operand 284 states and 1425 transitions. Second operand 11 states. [2018-12-24 14:08:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:08:10,193 INFO L93 Difference]: Finished difference Result 400 states and 1978 transitions. [2018-12-24 14:08:10,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:08:10,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2018-12-24 14:08:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:08:10,195 INFO L225 Difference]: With dead ends: 400 [2018-12-24 14:08:10,195 INFO L226 Difference]: Without dead ends: 393 [2018-12-24 14:08:10,196 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:08:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-12-24 14:08:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 366. [2018-12-24 14:08:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-12-24 14:08:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1845 transitions. [2018-12-24 14:08:20,925 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1845 transitions. Word has length 9 [2018-12-24 14:08:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:08:20,925 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1845 transitions. [2018-12-24 14:08:20,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:08:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1845 transitions. [2018-12-24 14:08:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:08:20,926 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:08:20,926 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:08:20,926 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:08:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:08:20,927 INFO L82 PathProgramCache]: Analyzing trace with hash -975025366, now seen corresponding path program 1 times [2018-12-24 14:08:20,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:08:20,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:08:20,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:08:20,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:08:20,927 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:08:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:08:21,099 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2018-12-24 14:08:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-24 14:08:21,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:08:21,156 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:08:21,156 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 10 with the following transitions: [2018-12-24 14:08:21,156 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [24], [26], [28], [29] [2018-12-24 14:08:21,157 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:08:21,157 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:08:21,158 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:08:21,158 INFO L272 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:08:21,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:08:21,158 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:08:21,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:08:21,159 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:08:21,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:08:21,173 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:08:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:08:21,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:08:21,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-12-24 14:08:21,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2018-12-24 14:08:21,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,191 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 23 treesize of output 33 [2018-12-24 14:08:21,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,219 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 25 treesize of output 47 [2018-12-24 14:08:21,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:08:21,229 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,254 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,267 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,278 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,288 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:08:21,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:08:21,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:08:21,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:08:21,398 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,412 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,425 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,440 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,466 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:08:21,466 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:61, output treesize:62 [2018-12-24 14:08:21,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:08:21,499 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:08:21,595 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:08:21,595 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:94 [2018-12-24 14:08:21,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,659 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:21,660 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 49 treesize of output 62 [2018-12-24 14:08:21,660 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,719 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:21,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 79 [2018-12-24 14:08:21,720 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,765 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 2 xjuncts. [2018-12-24 14:08:21,765 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:112, output treesize:74 [2018-12-24 14:08:21,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 82 [2018-12-24 14:08:21,811 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,868 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:21,869 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 65 [2018-12-24 14:08:21,869 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:21,908 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 2 xjuncts. [2018-12-24 14:08:21,909 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:100, output treesize:74 [2018-12-24 14:08:21,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:21,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 102 [2018-12-24 14:08:21,959 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:22,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:22,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:22,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:22,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:22,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:22,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:22,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 71 [2018-12-24 14:08:22,024 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:22,063 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:08:22,063 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:94, output treesize:66 [2018-12-24 14:08:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:08:22,106 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:08:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:08:22,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:08:22,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2018-12-24 14:08:22,173 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:08:22,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:08:22,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:08:22,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:08:22,174 INFO L87 Difference]: Start difference. First operand 366 states and 1845 transitions. Second operand 11 states. [2018-12-24 14:08:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:08:34,881 INFO L93 Difference]: Finished difference Result 441 states and 2134 transitions. [2018-12-24 14:08:34,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-24 14:08:34,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2018-12-24 14:08:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:08:34,884 INFO L225 Difference]: With dead ends: 441 [2018-12-24 14:08:34,884 INFO L226 Difference]: Without dead ends: 428 [2018-12-24 14:08:34,884 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:08:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2018-12-24 14:08:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 367. [2018-12-24 14:08:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-12-24 14:08:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1844 transitions. [2018-12-24 14:08:45,682 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1844 transitions. Word has length 9 [2018-12-24 14:08:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:08:45,682 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1844 transitions. [2018-12-24 14:08:45,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:08:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1844 transitions. [2018-12-24 14:08:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:08:45,683 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:08:45,683 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:08:45,683 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:08:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:08:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1143531808, now seen corresponding path program 1 times [2018-12-24 14:08:45,683 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:08:45,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:08:45,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:08:45,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:08:45,684 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:08:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:08:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-24 14:08:45,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:08:45,811 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:08:45,811 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 10 with the following transitions: [2018-12-24 14:08:45,811 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [20], [24], [26], [28], [29] [2018-12-24 14:08:45,812 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:08:45,812 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:08:45,814 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:08:45,814 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:08:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:08:45,814 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:08:45,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:08:45,814 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:08:45,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:08:45,823 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:08:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:08:45,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:08:45,831 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 18 treesize of output 21 [2018-12-24 14:08:45,834 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 21 treesize of output 23 [2018-12-24 14:08:45,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 33 [2018-12-24 14:08:45,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,848 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 25 treesize of output 47 [2018-12-24 14:08:45,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,856 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 27 treesize of output 62 [2018-12-24 14:08:45,857 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:45,881 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:45,894 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:45,904 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:45,914 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:45,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:08:45,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:08:45,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:45,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:08:46,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:08:46,026 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,040 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,053 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,068 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,094 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:08:46,094 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:08:46,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:08:46,134 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:08:46,222 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2018-12-24 14:08:46,222 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:94 [2018-12-24 14:08:46,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 67 [2018-12-24 14:08:46,311 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 96 [2018-12-24 14:08:46,372 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,420 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 2 xjuncts. [2018-12-24 14:08:46,420 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:112, output treesize:68 [2018-12-24 14:08:46,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,468 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:46,469 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 99 [2018-12-24 14:08:46,469 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,532 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:46,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 78 [2018-12-24 14:08:46,534 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,573 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 2 xjuncts. [2018-12-24 14:08:46,573 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:88, output treesize:62 [2018-12-24 14:08:46,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,625 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:46,625 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 39 treesize of output 83 [2018-12-24 14:08:46,626 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:08:46,687 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:08:46,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 106 [2018-12-24 14:08:46,688 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:08:46,737 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:08:46,737 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:88, output treesize:66 [2018-12-24 14:08:48,323 WARN L181 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 46 [2018-12-24 14:08:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:08:48,330 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:08:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:08:48,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:08:48,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:08:48,406 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:08:48,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:08:48,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:08:48,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:08:48,407 INFO L87 Difference]: Start difference. First operand 367 states and 1844 transitions. Second operand 12 states. [2018-12-24 14:08:56,352 WARN L181 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2018-12-24 14:09:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:09:09,311 INFO L93 Difference]: Finished difference Result 685 states and 3436 transitions. [2018-12-24 14:09:09,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-24 14:09:09,312 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2018-12-24 14:09:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:09:09,314 INFO L225 Difference]: With dead ends: 685 [2018-12-24 14:09:09,314 INFO L226 Difference]: Without dead ends: 677 [2018-12-24 14:09:09,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:09:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2018-12-24 14:09:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 545. [2018-12-24 14:09:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2018-12-24 14:09:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2791 transitions. [2018-12-24 14:09:25,452 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2791 transitions. Word has length 9 [2018-12-24 14:09:25,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:09:25,452 INFO L480 AbstractCegarLoop]: Abstraction has 545 states and 2791 transitions. [2018-12-24 14:09:25,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:09:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2791 transitions. [2018-12-24 14:09:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-24 14:09:25,453 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:09:25,453 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:09:25,453 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:09:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:09:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1616311456, now seen corresponding path program 2 times [2018-12-24 14:09:25,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:09:25,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:25,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:09:25,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:25,454 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:09:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:09:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:09:25,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:25,597 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:09:25,597 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:09:25,597 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:09:25,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:25,597 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:09:25,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:09:25,607 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:09:25,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:09:25,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:09:25,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:09:25,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:09:25,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:09:25,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:09:25,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:09:25,712 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:25,726 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:25,740 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:25,756 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:25,776 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 18 treesize of output 21 [2018-12-24 14:09:25,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2018-12-24 14:09:25,781 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 23 treesize of output 33 [2018-12-24 14:09:25,785 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 25 treesize of output 47 [2018-12-24 14:09:25,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:09:25,789 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:25,809 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:25,821 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:25,830 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:25,839 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:25,865 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:09:25,866 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:09:25,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:25,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:09:25,907 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:09:26,000 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2018-12-24 14:09:26,000 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:94 [2018-12-24 14:09:26,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 88 [2018-12-24 14:09:26,092 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:26,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,152 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:26,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 51 [2018-12-24 14:09:26,153 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:26,194 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 2 xjuncts. [2018-12-24 14:09:26,194 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:112, output treesize:86 [2018-12-24 14:09:26,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,263 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:26,264 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 99 [2018-12-24 14:09:26,265 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:26,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,331 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2018-12-24 14:09:26,331 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:26,365 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 2 xjuncts. [2018-12-24 14:09:26,365 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:106, output treesize:70 [2018-12-24 14:09:26,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,419 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 59 [2018-12-24 14:09:26,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:26,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:26,478 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:26,479 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 48 treesize of output 110 [2018-12-24 14:09:26,479 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:26,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:09:26,530 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:94, output treesize:66 [2018-12-24 14:09:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:09:26,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:09:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:09:26,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:09:26,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2018-12-24 14:09:26,649 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:09:26,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:09:26,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:09:26,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:09:26,650 INFO L87 Difference]: Start difference. First operand 545 states and 2791 transitions. Second operand 13 states. [2018-12-24 14:09:27,688 WARN L181 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-12-24 14:09:29,400 WARN L181 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2018-12-24 14:09:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:09:43,496 INFO L93 Difference]: Finished difference Result 550 states and 2805 transitions. [2018-12-24 14:09:43,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:09:43,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 9 [2018-12-24 14:09:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:09:43,498 INFO L225 Difference]: With dead ends: 550 [2018-12-24 14:09:43,498 INFO L226 Difference]: Without dead ends: 543 [2018-12-24 14:09:43,498 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2018-12-24 14:09:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-12-24 14:09:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 38. [2018-12-24 14:09:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-24 14:09:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 166 transitions. [2018-12-24 14:09:46,669 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 166 transitions. Word has length 9 [2018-12-24 14:09:46,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:09:46,669 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 166 transitions. [2018-12-24 14:09:46,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:09:46,669 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 166 transitions. [2018-12-24 14:09:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-24 14:09:46,670 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:09:46,670 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:09:46,670 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:09:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:09:46,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1518781026, now seen corresponding path program 1 times [2018-12-24 14:09:46,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:09:46,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:46,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:09:46,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:46,671 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:09:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:09:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:09:46,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:46,742 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:09:46,742 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-12-24 14:09:46,742 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [20], [24], [26], [28], [30], [31] [2018-12-24 14:09:46,743 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:09:46,743 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:09:46,745 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:09:46,746 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:09:46,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:09:46,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:09:46,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:46,747 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:09:46,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:09:46,764 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:09:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:09:46,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:09:46,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:09:46,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:09:46,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:09:46,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:46,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:09:46,935 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:46,951 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:46,967 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:46,981 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:47,003 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 18 treesize of output 21 [2018-12-24 14:09:47,005 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 21 treesize of output 27 [2018-12-24 14:09:47,007 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 23 treesize of output 37 [2018-12-24 14:09:47,040 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 25 treesize of output 51 [2018-12-24 14:09:47,058 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 66 [2018-12-24 14:09:47,059 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:47,448 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:47,670 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:47,832 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:47,983 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:48,338 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:09:48,338 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:69, output treesize:66 [2018-12-24 14:09:48,725 WARN L181 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-12-24 14:09:48,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:48,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:09:48,768 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:48,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:09:48,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:09:48,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:48,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:48,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:48,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:48,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:48,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:48,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:48,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:09:48,982 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:49,013 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:09:49,013 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2018-12-24 14:09:49,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,049 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:49,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:09:49,052 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:49,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:09:49,083 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2018-12-24 14:09:49,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:49,120 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:49,120 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 96 [2018-12-24 14:09:49,121 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:49,154 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. [2018-12-24 14:09:49,154 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:38 [2018-12-24 14:09:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:09:49,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:09:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:09:49,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:09:49,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2018-12-24 14:09:49,735 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:09:49,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:09:49,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:09:49,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:09:49,736 INFO L87 Difference]: Start difference. First operand 38 states and 166 transitions. Second operand 13 states. [2018-12-24 14:09:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:09:55,825 INFO L93 Difference]: Finished difference Result 67 states and 277 transitions. [2018-12-24 14:09:55,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:09:55,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-12-24 14:09:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:09:55,826 INFO L225 Difference]: With dead ends: 67 [2018-12-24 14:09:55,826 INFO L226 Difference]: Without dead ends: 58 [2018-12-24 14:09:55,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2018-12-24 14:09:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-24 14:09:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2018-12-24 14:09:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-24 14:09:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 171 transitions. [2018-12-24 14:09:59,207 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 171 transitions. Word has length 10 [2018-12-24 14:09:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:09:59,207 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 171 transitions. [2018-12-24 14:09:59,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:09:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 171 transitions. [2018-12-24 14:09:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-24 14:09:59,207 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:09:59,208 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:09:59,208 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:09:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:09:59,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1744942188, now seen corresponding path program 1 times [2018-12-24 14:09:59,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:09:59,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:59,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:09:59,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:09:59,209 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:09:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:09:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-24 14:09:59,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:59,339 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:09:59,340 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-12-24 14:09:59,340 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [18], [24], [26], [28], [30], [31] [2018-12-24 14:09:59,340 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:09:59,341 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:09:59,342 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:09:59,342 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:09:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:09:59,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:09:59,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:09:59,343 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:09:59,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:09:59,355 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:09:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:09:59,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:09:59,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:09:59,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:09:59,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:09:59,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:09:59,460 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,475 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,488 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,504 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,524 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 18 treesize of output 21 [2018-12-24 14:09:59,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2018-12-24 14:09:59,530 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 23 treesize of output 33 [2018-12-24 14:09:59,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:09:59,537 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 27 treesize of output 62 [2018-12-24 14:09:59,537 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,557 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,569 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,578 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,587 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,612 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,612 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:61, output treesize:62 [2018-12-24 14:09:59,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,650 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 36 treesize of output 62 [2018-12-24 14:09:59,650 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,674 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:09:59,675 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:46 [2018-12-24 14:09:59,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:09:59,721 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:09:59,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2018-12-24 14:09:59,813 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:68 [2018-12-24 14:09:59,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,869 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:59,870 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 83 [2018-12-24 14:09:59,870 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:09:59,931 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:09:59,932 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 104 [2018-12-24 14:09:59,932 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:09:59,981 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 2 xjuncts. [2018-12-24 14:09:59,981 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:88, output treesize:64 [2018-12-24 14:10:00,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,038 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:10:00,039 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 109 [2018-12-24 14:10:00,040 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:00,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:00,104 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:10:00,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 73 [2018-12-24 14:10:00,106 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:00,145 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:10:00,146 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:84, output treesize:64 [2018-12-24 14:10:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:00,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:10:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:00,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:10:00,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:10:00,297 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:10:00,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:10:00,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:10:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:10:00,298 INFO L87 Difference]: Start difference. First operand 39 states and 171 transitions. Second operand 12 states. [2018-12-24 14:10:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:10:06,718 INFO L93 Difference]: Finished difference Result 74 states and 289 transitions. [2018-12-24 14:10:06,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:10:06,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2018-12-24 14:10:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:10:06,719 INFO L225 Difference]: With dead ends: 74 [2018-12-24 14:10:06,719 INFO L226 Difference]: Without dead ends: 59 [2018-12-24 14:10:06,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-12-24 14:10:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-24 14:10:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2018-12-24 14:10:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-24 14:10:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 166 transitions. [2018-12-24 14:10:10,451 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 166 transitions. Word has length 10 [2018-12-24 14:10:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:10:10,451 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 166 transitions. [2018-12-24 14:10:10,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:10:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 166 transitions. [2018-12-24 14:10:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-24 14:10:10,452 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:10:10,452 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:10:10,452 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:10:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:10:10,452 INFO L82 PathProgramCache]: Analyzing trace with hash 854957070, now seen corresponding path program 1 times [2018-12-24 14:10:10,452 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:10:10,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:10:10,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:10:10,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:10:10,453 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:10:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:10:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-24 14:10:10,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:10:10,581 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:10:10,581 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-12-24 14:10:10,581 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [20], [24], [26], [28], [30], [31] [2018-12-24 14:10:10,582 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:10:10,582 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:10:10,584 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:10:10,585 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:10:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:10:10,585 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:10:10,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:10:10,586 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:10:10,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:10:10,599 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:10:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:10:10,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:10:10,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:10:10,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:10:10,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:10:10,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:10:10,706 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,719 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,733 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,748 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,767 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 18 treesize of output 21 [2018-12-24 14:10:10,770 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 21 treesize of output 23 [2018-12-24 14:10:10,773 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 23 treesize of output 33 [2018-12-24 14:10:10,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 47 [2018-12-24 14:10:10,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 62 [2018-12-24 14:10:10,780 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,801 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,813 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,822 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,831 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,857 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:10,857 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:61, output treesize:62 [2018-12-24 14:10:10,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,901 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 51 [2018-12-24 14:10:10,901 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,917 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:10,918 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:10:10,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,944 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:10:10,948 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:10,974 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:10,974 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:25 [2018-12-24 14:10:10,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:10,999 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:10:11,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,001 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 76 [2018-12-24 14:10:11,001 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:11,023 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. [2018-12-24 14:10:11,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:25 [2018-12-24 14:10:11,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:11,057 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:10:11,057 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 75 [2018-12-24 14:10:11,058 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:11,079 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:11,080 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:33 [2018-12-24 14:10:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:11,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:10:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:11,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:10:11,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2018-12-24 14:10:11,234 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:10:11,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:10:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:10:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:10:11,234 INFO L87 Difference]: Start difference. First operand 38 states and 166 transitions. Second operand 13 states. [2018-12-24 14:10:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:10:18,736 INFO L93 Difference]: Finished difference Result 80 states and 341 transitions. [2018-12-24 14:10:18,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:10:18,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-12-24 14:10:18,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:10:18,737 INFO L225 Difference]: With dead ends: 80 [2018-12-24 14:10:18,737 INFO L226 Difference]: Without dead ends: 71 [2018-12-24 14:10:18,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:10:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-24 14:10:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-12-24 14:10:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-24 14:10:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 296 transitions. [2018-12-24 14:10:25,474 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 296 transitions. Word has length 10 [2018-12-24 14:10:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:10:25,474 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 296 transitions. [2018-12-24 14:10:25,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:10:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 296 transitions. [2018-12-24 14:10:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-24 14:10:25,475 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:10:25,475 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:10:25,475 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:10:25,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:10:25,475 INFO L82 PathProgramCache]: Analyzing trace with hash 997631658, now seen corresponding path program 2 times [2018-12-24 14:10:25,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:10:25,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:10:25,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:10:25,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:10:25,476 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:10:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:10:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-24 14:10:25,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:10:25,577 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:10:25,577 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:10:25,577 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:10:25,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:10:25,577 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:10:25,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:10:25,586 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:10:25,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-24 14:10:25,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:10:25,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:10:25,596 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 18 treesize of output 21 [2018-12-24 14:10:25,598 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 21 treesize of output 23 [2018-12-24 14:10:25,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2018-12-24 14:10:25,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2018-12-24 14:10:25,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 42 [2018-12-24 14:10:25,628 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,643 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,653 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,662 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,672 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2018-12-24 14:10:25,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2018-12-24 14:10:25,693 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 22 treesize of output 24 [2018-12-24 14:10:25,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2018-12-24 14:10:25,714 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,721 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,728 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,735 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,751 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:10:25,751 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:36, output treesize:42 [2018-12-24 14:10:25,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2018-12-24 14:10:25,785 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:10:25,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-24 14:10:25,810 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:35 [2018-12-24 14:10:25,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 32 [2018-12-24 14:10:25,836 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,863 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 32 treesize of output 42 [2018-12-24 14:10:25,863 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,897 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-24 14:10:25,898 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:35 [2018-12-24 14:10:25,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,925 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 60 [2018-12-24 14:10:25,925 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:25,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2018-12-24 14:10:25,970 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:25,984 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 2 xjuncts. [2018-12-24 14:10:25,985 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:28 [2018-12-24 14:10:26,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2018-12-24 14:10:26,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:26,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,040 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 62 [2018-12-24 14:10:26,041 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:26,066 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 2 xjuncts. [2018-12-24 14:10:26,067 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:30 [2018-12-24 14:10:26,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,103 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:10:26,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,104 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 30 treesize of output 55 [2018-12-24 14:10:26,105 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:26,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:10:26,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2018-12-24 14:10:26,135 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:10:26,153 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 2 xjuncts. [2018-12-24 14:10:26,153 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:54, output treesize:34 [2018-12-24 14:10:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:26,182 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:10:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:10:26,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:10:26,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2018-12-24 14:10:26,266 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:10:26,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:10:26,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:10:26,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:10:26,267 INFO L87 Difference]: Start difference. First operand 64 states and 296 transitions. Second operand 13 states. [2018-12-24 14:10:33,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:10:33,352 INFO L93 Difference]: Finished difference Result 71 states and 316 transitions. [2018-12-24 14:10:33,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:10:33,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2018-12-24 14:10:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:10:33,352 INFO L225 Difference]: With dead ends: 71 [2018-12-24 14:10:33,353 INFO L226 Difference]: Without dead ends: 0 [2018-12-24 14:10:33,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:10:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-24 14:10:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-24 14:10:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-24 14:10:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-24 14:10:33,354 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2018-12-24 14:10:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:10:33,354 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-24 14:10:33,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:10:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-24 14:10:33,354 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-24 14:10:33,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-24 14:10:33,590 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:10:33,693 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:10:34,227 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:10:37,293 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:10:46,550 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:10:46,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:10:46,584 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:10:46,590 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:10:46,897 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:10:46,929 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:11:07,737 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:11:07,923 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:11:32,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:11:44,422 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:11:45,547 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:11:47,138 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:11:47,757 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:11:53,746 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:11:59,192 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:12:03,259 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:12:19,742 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-24 14:12:19,782 WARN L250 erpolLogProxyWrapper]: Already inconsistent.